Thursday, April 30, 2009

Do flowers normally have more stamens or pistils?

Complete flowers (flowers that have both sexes) have both. Stamens are the male part and pistils are the female part. Incomplete flowers have only one or the other. Most plants produce complete flowers but some, like holly, have male plants and female plants. The male plant flowers would have only stamens. The female plant flowers have only pistils.





In complete flowers there are more stamens.

Do flowers normally have more stamens or pistils?
it depends on their breed and species
Reply:Flowers have more stamens than pistils.
Reply:Normally more stamens.


I need homework help on plants?

the question is :in many flowers the pistils and stamens reach maturity at different times why would this be an advantage to the plant?


%26amp;


if the petals are absent or reduced how is the plant pollinated?

I need homework help on plants?
It prevents the plant from self-pollinating.





If the plants lacks colourful petals to attract bugs, it usually has an attractive scent.
Reply:To the first: it would be advantageous b/c if the plant did fertilized itself nothing bad would happen but there would not be any genetic variation in the offspring of the plant. And of course, genetic variation and thus natural selection is the basis of evolution and the improving of a species as a whole.





Also as was already stated, petals are meant to attract pollinators. The other way a plant could be pollinated is by the wind. Ex: Gymnosperms (non flower producing plants like pine trees) are pollinated by the wind.





Hope this helps!
Reply:The advantage to the plant is that this prevents self - fertilisation. If a plant pollinates itself this can lead to defects in the 'baby' plants so to avoid this many species have the male and female flowering parts mature at different times.





In general, if a flower has reduced petals it is likely to be wind pollinated (eg grasses) - large petals are used to attract pollinators, wind pollinated plants do not need these and need to have their style and stamens exposed to the wind so the petals cannot cover them.
Reply:Different maturation of stamens and pistils avoids self-fertilization of the ovules in the pistils. Usually pollination by a different plant of the same species increases genetic variations, some of which may be better adapted to the environment such as disease resistance, more vigorous growth, or more viable seeds. Some flowers are self-sterile. They have to have pollen from a different plant.





Most flowers that have reduced or absent petals (corolla) are pollinated by the wind rather than animals, grasses for example.
Reply:The first one would give the plant opportunities to pollinate other plants and be pollinated by other plants before it self-pollinates.


How are flowers reproductive structures?

My textbook states that flowers are reproductive structures. Aren't the reproductive structures of flowers, stamens and pistils? If flowers are reproductive structures, does that make pelvises reproductive structures too? %26gt;_%26gt;

How are flowers reproductive structures?
Flowers are reproductive structures. Stamens and Pistils are parts of flower.





Compare with Human reproductive organs. Human have both external and internal reproductive organs.
Reply:The plant body is divided into two parts Vegetative parts and Reproductive parts, flowers come under reproductive parts, this is what the book explains.
Reply:ur text is right


dont get messed up


In his experiments with plants, Mendel removed which part of the plant to prevent unwanted fertilizations?

a) flowers


b) petals


c) pistils


d) staments


e) stigmas

In his experiments with plants, Mendel removed which part of the plant to prevent unwanted fertilizations?
D, stamens.





Usually to prevent self-fertilization.

loop

How some people can wear caps all day?

Caps/hats like these: http://www.thegreenhead.com/imgs/pistil-...





Doesn't it cause overheating and itching? I guess these are special ones that lets air in, unlike the ones for cold?





Also where can I find these kind of hats? Preferably ones that doesn't have stitch marks so it would look totally round on the top however you wear them.











Thanks.

How some people can wear caps all day?
theyr bald or 4 fashion reasons
Reply:ask Hmesh Reshmiya, bollywood singer who is never seen without wearing caps
Reply:Going bald, trying to hide it.
Reply:shop online
Reply:Search your local mall. :)
Reply:thay are bald lol


This flower is in Southern Idaho, growing on a bush or tree. I've looked everywhere, but can't figure it out.

It is small, white, five petals, with large pistils and stamens from the middle (orange colored) Seems to be growing on a branchy sort of thing, long, three to a bunch slender leaves.

This flower is in Southern Idaho, growing on a bush or tree. I've looked everywhere, but can't figure it out.
Souther Idaho ? Hi neighbor, I live near Kimberly. Sorry I can't answer your question though;)
Reply:"small, white, five petals"...





Sounds like something from the rose family. Could be a variety of things, it's kind of hard to tell without a picture.





But you said large pistils and stamens... it might be something else.





It does not sound like flowering dogwood.








Please, if you can get a picture please post it.
Reply:Does it look like this?


http://en.wikipedia.org/wiki/Flowering_D...


scroll to the bottom there are different varieties.


How many petals,sepals,stamens and pistils are there in hibiscus, gulmohar, petunia,jasmine?




If the petals of a flower are joined together, then the pistil is joined to the petal?

No, if the petals are attached to pistil or gynoecium then they are attached below the "pistil". More often the petals are attached to the gynoecium.

If the petals of a flower are joined together, then the pistil is joined to the petal?
the pistil (or the carpel(s)) is actually joined to the peduncle. if the flower is blooming, the petals are merely wrapped around the pistil and the stamen. as the flower opens...
Reply:Fusion of petals is called gamopetalous.If they are joined ,the carpels need not be attached to them.

roller blades

Any idea what kind of flower/ plant this is?

It has big dark green leaves that are shiny ,it is about 3 feet tall, has long stems with a single red leafed flower that has pistils the shape of small bananas that are yellow and black. Truly beautiful.My friend said it might be a lily of some type. I'd like to dig up and transplant.

Any idea what kind of flower/ plant this is?
if it is tall and has one stalk and has leaves sticking out he sides... it is some sort of lily yes.. very easy to transplat.. just dont damage the bulb
Reply:Probably a canna lily .They have bulbs and are easy to grow and come in all colors. http://www.stoygarden.com/2_Plant_%26amp;_Flow...
Reply:its probably a canna liliy.


How/why is it advantageous for a plant that the stamins and pistils mature at different times?

This is all tied in with plant pollination and flower plants and stuff... thanks...

How/why is it advantageous for a plant that the stamins and pistils mature at different times?
It reduces the possibility for self-pollination.





Genetic diversity leads to increased fitness. Diversity is required for evolution to occur.
Reply:Prevents self-pollination and encourages out-crossing which leads to greater genetic diversity within the population.
Reply:Encourages cross pollination, reshuffle the DNA.


Where are the reproductive organs found in dandelions?

Looking at the fiery yellow flowerhead, I have neer seen anything resembling stamens or pistils, but just the many numbered petals themselves. Are the organs hidden somewhere inside the flowerhead?

Where are the reproductive organs found in dandelions?
They are there, but not very large. Use a magnifying glass -- and, if you run short of dandelions, you are welcome to take as many from my yard as you want. (Please!)
Reply:Dandelion has ray flowers and tube flowers. You have to use the dissecting microscope to see the pistil and stamen of these florets.


One of my hash plants is not flowering?

It has pistils but no pollen sacks, the other plant is flowering really well.


Could it be a hamaphradite.

One of my hash plants is not flowering?
Are they growing indoor or outdoor? If its indoor there may be light leaking into the room. The plant may be sick, is it drinking normaly? I would move the plant to another location and wait until its entirely dry to feed and just give it water. Try to keep it in the shade or not in direct light for a while until things change.
Reply:Call the cops. They have a really


good horticulturist and a botanist


that will be happy to help you.
Reply:Man, get that plant out of there! It is a male, males don't flower. Plus it will pollenate the female and ruin it, you won't be able to smoke it!!!!

Toothbrush

Pistils and stamens reach maturity at different times?

In many flowers, the pistils and stamens reach maturity at different times. Considering what you know about pollination, why would this be an advantage to the plant?

Pistils and stamens reach maturity at different times?
By maturing at different times, the flower is forced to fertilize, or be fertilized by another. This is nature's way of preventing inbreeding and ensuring that the result will be vigorous progeny.
Reply:Maturing at different stages means they won't pollinate themselves. If they can't pollinate themselves, someone else will have to, and that ensures genetic diversity.
Reply:Hi,


According to xkp .... speech, cross breeding is insuring high genetic variability. And that's the way to evolute and maintain the species well-adapted in their environment. So if the maturity of sexual organs occure at different times, cross breeding is an obligate way to reproduction (pollen grains of another plant come to the pistil, grains of that plant will go on another pistil). If the pistil reach maturity first, it's progyny, if stamens reach maturity first, it's proandry. Even if you're a plant, "consanguinity" is not a good way to survive.


My friend Daisy is hotter than a pistil, but her boyfriends want to get sex change operations.?

Should they stamen and deflower Daisy?

My friend Daisy is hotter than a pistil, but her boyfriends want to get sex change operations.?
Wow....... so you are in a flower mood? Whatever gave you such a green thumb today? Ok so your thumb isn't so green.... Botany sure is.





But to answer your question.....They should get the sex change operations. If Paul n Nate want to be pansies..... let them! Daisy has no right to stop them. She should stay quiet. Mum's the word. She shouldn't expect tulips to touch hers if those lips crave different roots.
Reply:Not much botany humor around here. However, I guess that topic has been deflowered now.
Reply:If one of them rose to the occasion they could get rid of their bachelor buttons and marigold her and really watch her blossom. Her boyfriends could remain best buds, of course.
Reply:Wow that was a good one "Seinfeld". You really should go on stand up tour and take this joke around the country.


What is the name of a typical flower?

It includes a corolla, calyx, stigma, style, ovary, ovule,pollen, pollen tube, filament, anther, stamen, pistil, petal, sepal and receptable.

What is the name of a typical flower?
Rose is a good example of the flower you have in mind.





Magnolia grandiflora, and Lotus are other examples.
Reply:"Tribulus terrestris" is the typical flower.
Reply:its a man bush
Reply:Tulip
Reply:Flowers that contain all of the parts that you have mentioned are known as perfect and complete. In order for a flower to be perfect it needs to contain the male parts, known as the stamen, and the female parts, known as the pistil, and both need to be functioning. The stamen is made up of the anther and filament and the pistil is made up of the stigma, style, and ovary. If the flower were to be missing either a male or female part or one was sterile, that flower would be known as imperfect. Complete flowers have the pistil, stamen, corolla, and calyx. Incomplete flowers lack one or more of the pistil, stamen, corolla, or calyx. Flowers that only have the female parts are known as pistillate and male flowers are known as staminate.
Reply:हिबीस्कस फ़्लॉवर


Hibiscus flower


What makes you feel like a sticky pistil?

your 'stamen'

What makes you feel like a sticky pistil?
Attempted {whew, that was close!} and successful {didn't move fast enough, damn!} hugs from the crack entourage, I'm like a kinetic pole....
Reply:Al the cop
Reply:putting my semiautomatic in pancake syrup!
Reply:umm...what's a pistil?
Reply:Every time I hear a buzzing sound.
Reply:wet dream ??
Reply:Hoagy Carmichael
Reply:hand jive

speed ice skates

My parents told me we reproduce through pollination?

when will my stamen engorge another ladie's pistil?

My parents told me we reproduce through pollination?
give it a few years, you're obviously too you to pollinate anything.
Reply:When you are much, much older...
Reply:When you are much older. You will find a woman you love. Then there will be this specail connection.
Reply:your parents lied to you ,ask them to tell you the real story about the birds and the bees!!
Reply:so your parents are plants
Reply:haha to funny
Reply:funny. u dtill in 1st grade?


In angiosperms, after pollenation occurs and a pollen tube forms, is the pollen still present on the stigma?

Does the pollen grain stay on the tip of the pistil, or does it move down into the pistil's interior with the pollen tube?

In angiosperms, after pollenation occurs and a pollen tube forms, is the pollen still present on the stigma?
The pollen tube grows from the grain deposited on the stigma of the female pistil carrying the tube nucleus and 2 sperm nuclei for double fertiliztion of the ovule. The grain opens up and is only the carrying vessel for the gametes. It stays outside on the stigma.
Reply:There are three parts to a flowers pistil. The stigma, the style, and the ovary. First the pollen sticks to the stigma which is the very tip, that's where you are seeing the pollen stick to it. Then it goes down the style into the ovary. Not all the pollen goes down into the style.


The 9mm high-point pistil, can adiffrent firing pin be bought , to replace the cheaper ones?

Contact BeeMiller for firing pins and recoil springs for your hi point firearm. The firing pins are cheap quality, order 3 or 4, they're inexpensive. Get a couple recoil springs too while you're at it and replace it now while it's apart for firing pin replacement.

The 9mm high-point pistil, can adiffrent firing pin be bought , to replace the cheaper ones?
it depends on the brand of gun but yes
Reply:trade in the hipoint for an AR
Reply:You could ask the manufacturer. He would know if that is something that is doable. He might even be able to make one for you. They would need to offer a more effective pin. But I don't know of any that you can just use to replace.


How can you tell the difference between pistillate and staminate flower?

I have a flower but I see stamens and Im sure it is a staminte but how do you know if it has pistils?

How can you tell the difference between pistillate and staminate flower?
Look in the center of the flower. If it is small you might need a hand lens. Botanists who do a lot of field work always have a small hand lens hanging around their necks for that reason.

roller skates

What is the anatomy of a tulip? Can you show a picture?

I would like to see a picture of a tulip with it's parts labeled. the petal,pistil,stamen.sepal, and stem

What is the anatomy of a tulip? Can you show a picture?
This isn't necessarily a tulip but the parts are the same.


Besides the ovary, what other two parts make up the pistil (female reproductive structure)?

Just a couple of word, no more, no less!!!!!

Besides the ovary, what other two parts make up the pistil (female reproductive structure)?
Wrong category, Sweetie. You'd want to go to "Health" and then"Women's Health." :)
Reply:Is it the phallopian tubes?
Reply:stigma, style


Can someone tell me about the DNA of aggregate fruit and multiple fruit?

I was eating raspberries today and I started thinking aobut how I had heard they were aggregate fruit. A simple fruit is one from an ovary with only one pistil. Thereforeit could be pollinated by only one male plant, right? In the case of an aggregate fruit which develops from a flower with numerous simple pistils couldn't the individual pistils hypothetically be fertilized by different male plants? Would this mean that the individual simple fruits that make up a raspberry are genetically different. As if one raspberry is a collection of brother and sister fruit? What about a multiple fruit , like pineapple? A cluster of flowers produce a single fruit. If each of these flowers is fertilized individually, but they mature into a single mass does the pineapple have DNA from some of the flower fertilizations in some cells and sibling DNA in other cells or is all the DNA in every cell of the pineapple?

Can someone tell me about the DNA of aggregate fruit and multiple fruit?
yes, each pistil can be fertilized by different pollen, but generally the properties of the fruit is dependant on the genes of the mother - the flesh of the fruit is mother tissue, so the dna of the seed is not affecting this much. that is why all the apples, cherries on one tree are quite the same even it they were pollinated by different "fathers" - but if u grow the seeds in mature trees, they may differ in their various properties.
Reply:They can be pollinated independently, as a general rule.


How many petals,sepals,stamen,pistils are there in the Hibiscus, Gulmohar, Petunia n in Jasmine flowers?

Hibiscus-5petals

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Good cheap, household materials to make a model of a flower and its parts out of?

I need to make a model of a flower and its parts (petal, stamen with anther and filament, sepal, ovule, and pistil with stigma, style, and ovary). I tried clay but it didn't work at all. So I need some good cheap household materials and instructions if possible on how to make them. Thanks!

Good cheap, household materials to make a model of a flower and its parts out of?
It can be done and what comes to my mind is a hanger! You know the bendy silver ones. You can make the stem, twist hanger around to shape leaves. Maybe use candel wax to add petals as an effect which will wtick to the hanger once it cools down. While the candel wax is hot - cut green material and place i on the wax which will be the effect of the leaves etc %26amp; work from there. Hope this helps!! :)
Reply:You need some craft glue, cardboard, and pipe cleaners. Bend the pipecleaners into a stem with a substantial amount folded at both ends of the pipecleaner. Glue one end to a peice of cardboard for the bottom of the stem to make the 'ground'. Take another pipe cleaner and bend it into a couple of loops, now squash the loops right next to each other loop to make the petals. If you need to, grab another pipecleaner and twist the end to the end of the other "petals" pipecleaner. When you have something resembling the petals of a flower twist the end of the pipecleaners around each other and fold it underneath the flower petals to make a base which you need to glue onto a piece of cardboard circle. Make the circle around 4 1/2 inches in diameter. Now glue this circle (with the petals attatched) to the bent over end of the 'stem' pipecleaner. Draw a small circle on this cardboard base to represent the ovary. The stamen will be a bit tricky, but if you can find some wire, cut tiny lengths and simply stick them through the cardboard sitting under the petals. Hows that? Goodluck
Reply:Cotton buds could do the anther and filament - five cotton buds and paint them yellow should be easy enough.





Petals could just be card, you might be able to cut up a colourful bottle top if you're feeling adventurous, but I can't think of how to stick it down... hmm, actually, you got any blue tack?





The stem could be a garden stick, you know the little green ones? About 5 mm square rods could be the stem and it should be tough enough to hold up the rest. If you don't have that then just find a green pencil, and again, use blue tack or plasticine to hold it in place.





The sepal could just be green card again, wrapped around your pencil.





The fiddly bit in the middle is harder - may I recommend plasticine? Use different colours to get the ovule and ovary and all that.





Good luck, and have fun!
Reply:Dear Erika,





I think that petals and leaves could be made of paper which you color or paint in appropriate colors. The stem could be of wire wrapped with paper. If you have any of those tiny wires used in telephone connections, they could be used to make the stamen, perhaps with a small wad of tissue at the end. The pistil form would depend on what kind of flower you are making, but a wad of tissue at the bottom, center of the stamens might work.











Tiger Toy
Reply:I always liked using candy to build models. Of course it will be a flat 2-D model, buts it would be fun to use things like sprinkles, licorice, crushed up candy... etc


Fireworks - what are names of all the types that you see in a professional display? Is there a web site?

I saw an article showing the chrysanthemum, willow, maroon, pistil, ring shell, round shell,and palm. I know there are lots more but I wonder what they are called. When I'm laying on that blanket watching the show I'd like to know more about what I'm seeing.





A web site that shows the display with a name and description would be helpful. Anybody seen that?

Fireworks - what are names of all the types that you see in a professional display? Is there a web site?
What you need is fireworks.com


See also Yahoo Images for some great shots of fireworks
Reply:Here ya go


http://www.saxtonsmith.co.uk/fw/glos2.ht...


http://www.pyrouniverse.com/aerialeffect...


.


Pistil and stamen?

Hi, just a little stuck on this question. What do pistil and stamen have in common and how are they different from each other? And also, what do a flower and a cone have in common and how are they different from each other? Thanks =)

Pistil and stamen?
Pistil and stamen are the reproductive parts of a flower!





The pistil is the girl part and has the egg, the stamen is the boy part and has the pollen.





A flower and a cone are both reproductive structures. However, a cone is the fruiting body of a conifer, but isnt actually a fruit.


What is the opposite of a hermaphrodite?

I need it really quick for science class tomorrow! The answer is not pistil and stamen! I really bad need to know and what is the term used for plants with only one of the reproductive parts! Please help!

What is the opposite of a hermaphrodite?
Well, if a hermaphodite is both sexes, then the opposite would naturally be something with no sex. Asexual.
Reply:The word HERMAPHRODITE has its roots in the Greek Mythological figures Hermos (Male) and Aphrodite ( female).


In biological language it means an animal or plant having both, male and the female sex organs in one and the same individual. It is just another word for BISEXUAL.


If Hermaphrodite = Bisexual . Then the opposite is Unisexual or Dioecious.
Reply:her•maph•ro•dite





Pronunciation: (hûr-maf'ru-dīt"), [key]


—n.


1. an individual in which reproductive organs of both sexes are present. Cf. pseudohermaphrodite.


2. Biol.an organism, as an earthworm or plant, having normally both the male and female organs of generation.


3. a person or thing in which two opposite qualities are combined.





—adj.


1. of, pertaining to, or characteristic of a hermaphrodite.


2. combining two opposite qualities.


3. Bot.monoclinous.





--------


hermaphrodite


noun





1. A human being, plant or animal that, either normally or abnormally, possesses both male and female reproductive organs, eg the earthworm and many plants.


2. A compound of opposite qualities.





adj





1. Combining the characteristics of both sexes or opposite qualities.





Derivative: hermaphroditic





Belonging to or having characteristics typical of a hermaphrodite.


Combining two opposites.


Derivative: hermaphroditically


adverb





Derivative: hermaphroditism


noun





The union of the two sexes in one body.


Etymology: 15c: named after Hermaphroditos, in Greek mythology the son of Hermes and Aphrodite, who grew into one person with the nymph Salmacis.





------------------


Hermaphrodite, Hermaphroditos, Hermaphroditus, Hermes, Hermetic, Hermetical, Hermit (Aka: Androgynous / Half and half)

















Accepted definition: A person born with both male and female sex organs. This is a vague, confusing and inaccurate definition. There are 3 labels of Hermaphrodites: True, Male pseudo and Female Pseudo. All are equally genuine. The term "hermaphrodite" is derived from the ancient Greek myth of Hermaphroditus, son of Hermes and Aphrodite. While bathing, he became united in a single body with a nymph.


Sequential hermaphrodite: The organism is born as one sex and later changes into the other sex.


Protandry: When the organism starts as a male, and changes sex to a female later in life. Example: The seabasses (Family Serranidae). These are a highly sought food fish complex made up of primarily groupers. Since even a small male can produce more than enough sperm to fertilize a huge number of eggs, while a female's egg output increases greatly with an increase in size, this strategy makes sense for an organism (fishes in general) where over 99% of the eggs laid will not result in a fish that reaches sexual maturity. It has been shown that fishing pressure actually is causing a change in when the switch from male to female occurs, since fishermen naturally prefer to catch the larger fishes. The populations are generally changing sex at a smaller size, due to natural selection.








Protogyny: When the organism starts as a female, and changes sex to a male later in life. Example: Wrasses (Family Labridae) are reef fishes that tend to have three distinct sexual types. Small females, immature males and supermales. The small females and the immature males have identical colorations. The supermale is usually brightly colored, and there is only one in a given area of the reef. This supermale dominates the other wrasses of the species, having the choice of females to mate with. When the supermale dies, the largest wrasse in the area, male or female, becomes the new supermale.


'Simultaneous hermaphrodite: The organism has both male and female sexual organs at the same time as an adult. Usually, self-fertilization does not occur. Also called synchronous hermaphrodites.' Examples: Earthworms. Hamlets (Family Haemulidae) are a type of fish that are curious for many reasons, including that they seem to be evolving into different species quite rapidly. Unlike other fishes, hamlets seem quite at ease mating in front of divers, allowing observations in the wild to occur readily. They do not practice self fertilization, but when they find a mate, the pair takes turns between which one acts as the male, and which acts as the female, through multiple matings, usually over several nights --- wikipedia


TRUE





A person born with both ovary and testicular tissue, this could be 2 seperate gonads ( one of each) or a combination of both in one (an ovotestes). The genitalia can vary from completely male or female, to a combination of both or even ambiguous looking. The chromosome (karotype) compliment can be XX (female), XY (male), XX/XY (mosiac) or even XO (extremely rare). Those XX with female genitalia are raised female ( some have even given birth). Those XY with male genitalia are raised male ( a few have fathered children). The children born XX/XY or XO (with genitalia male or female are raised in the sex they look most like) ,Those born with ambiguous genitalia have many medical tests for the doctors to determine which sex they should be assigned. Doctors then recommend early surgery to make the child look physically like the sex assigned to them.


CAUSES





The causes are not known, The medical community does know this is a very rare condition but do not have accurate figures to how many people have this condition (depending on the literature between 350-450 known cases).


FEMALE PSEUDO





A person born XX with normal female internal organs but with "masculanized" genitalia. They can appear more male then female or a combination of each.


CAUSES





The most common is Congenital Adrenal Hyperplasia (CAH) it occurs approximately 1:14,000 births.This is when the adrenal glands overproduce testosterone. It also has been recorded that some persons with this disorder had been exposed to progesterone-like drugs before they were born.


MALE PSEUDO





A person born XY with testes (usually in the abdominal cavity). The external genitalia are usually female but can be ambiguous.


(An intersexual is a person with genitalia of indeterminate sex, or which combine features of both sexes. Intersexuals include both "true hermaphrodites", those with equally male and female genitals, and "pseudo-hermaphrodites", those with genitals which are closer to one sex or the other, while combining features of both; but many dislike these terms as being overly medical. It is estimated [1] that perhaps 1.7 percent of live births are actually intersexual. -wikipedia)


CAUSES





The most common cause is Androgen Insensitivity Syndrome (AIS). This is when the body doesn't respond to the androgen being produced. There are different variations: Complete (CAIS) , and Partial (PAIS). This condition has a variety of names and occurance rates..





HEMOPHRODITES IN ANIMALS





By Bijal P. Trivedi


National Geographic Today


April 16, 2002


Atrazine, a top selling weed killer in the United States and the world, has been found to dramatically affect the sexual development of male frogs, turning them into hermaphrodites -creatures with both male and female organs- at concentrations 30 times lower than those deemed safe by the U.S. Environmental Protection Agency (EPA).





"What struck us as unbelievable was that atrazine could cause such dramatic effects at such low levels," says Tyrone Hayes, an associate professor of integrative biology at the University of California, Berkeley, who led the frog study.


"If you take five grains of salt, divide this weight by five thousand, that is the amount of atrazine that causes these abnormalities," added Hayes.


The EPA has set the limit for atrazine contamination for drinking water at 3 parts per billion (ppb). Hayes' and his colleagues found that concentrations of 0.1 ppb caused abnormalities.


The scientists exposed tadpoles of the African clawed frog, a popular research organism, to atrazine at concentrations as low as 0.1 ppb. When the tadpoles reached adulthood, Hayes found that between 16 and 20 percent had abnormal reproductive systems.


"Some had three ovaries and three testes, some had ovaries on one side and testes on the other, one animal even had six testes," says Hayes. The male voice box also shrunk, resembling the female version. And, when males were exposed to levels as high as 25 ppb of atrazine, the frogs showed a ten-fold decrease in testosterone levels.


Based on work done in other laboratories, Hayes' team suspects that atrazine feminizes the frogs by increasing production of an enzyme called aromatase, which converts testosterone to estrogen.


These results are published in the April 16 issue of Proceedings of the National Academy of Sciences.


All kinds of stress induce plants to become hermaphrodites. These include irregular light cycle, water stress, and some chemicals. Hermaphroditism is also a genetic trait that indicates even without stress. --- Ed Rosenthal





First 'test tube hermaphrodite' reported


January 18, 1998


Web posted at: 10:59 a.m. EDT (1059 GMT)


ATLANTA (CNN) -- The odds of a human being naturally having both male and female sexual characteristics are slim, both in the general population and for so-called "test tube babies" conceived through in vitro fertilization. In fact, in 20 years of in vitro fertilization, it has never happened -- until now.


In the latest issue of the New England Journal of Medicine, Scottish researchers reported the first known case of a hermaphrodite found in an in vitro fertilization.


The researchers say couples using the process should be warned of this possible outcome, though it is unlikely to happen to them.


More than 100,000 babies have been born through IVF since Louise Brown, the world's first test tube baby, was born in 1978.


The hermaphrodite case, the only one of those thousands to develop this irregularity during conception, arose due to an error in the fertilization. During the IVF process, a male embryo, with an x and y chromosome, and a female embryo, with two x chromosomes, fused.


"In combination, the genetics or chromosomes were mixed to become one fetus," explained Dr. Dorothy Mitchell-Leef, a reproductive biology associate, who says the true hermaphrodite condition is found in nature "maybe one in every 25,000 deliveries."


The condition is not life-threatening. It can be surgically corrected


Is hermaphrodite a proof of evolution?


Hermaphrodites do not have any new information, but in humans are the result of an abnormality in embryonic development. Human embryos are sexually dimorphic at first (i.e. contain characteristics of both sexes), because they all have basically the same genetic information, and this information is expressed as efficiently as possible as the embryo develops. This is design economy. For example, in all human embryos, at first both the müllerian duct system (female) and the wolffian duct system (male) develop, because both sexes have the genetic information for these structures. Incidentally, this refutes the urban myth that human embryos 'start off female'. The subsequent differences are the result of designed chemical signals that control the expression of the information. E.g., a gene set usually found on the Y chromosome controls the levels of testosterone and dihydroxytestosterone (DHT) secretion. Above a certain level, these hormones suppress the development of the müllerian duct system and promote the wolffian duct system, so the embryo takes on masculine characteristics. Below a certain hormone level, the opposite happens, and the embryo takes on female characteristics. But if for some reason the genetic information for one sex or the other is not switched off, then a hermaphrodite results. This hasn't the slightest thing to do with evolution from goo to you via the zoo.


In short, the hermaphroditic state arises because of a defect in development. Such defects happen in our fallen world. It does not involve any new genetic information, so it has nothing to do with Evolution. A lesson is: if readers are faced with a 'proof' of evolution, just ask whether any new genetic information arises, i.e. whether it really has anything to do with real molecules to man evolution, and how this 'proof' refutes the Biblical creation framework. -((Dr) Jonathan Sarfati Research scientist, author and editorial consultant AiG (Australia))


CONCLUSION:


I find it kind of strange with all the advance technologies that we posses that we can't seem to find to cause of hermaphrodites existence. Yet in plants and other animals it is so easy. Plus, when it occurred in the test tube humans we could account for it. I don't buy it.


They are two train of thought:


One, from the above statements from leading sources, a chemical imbalance had been found in the plant/animal cases. Therefore, it could be a chemical 'mis-up' in our environment, through fertilizers, processed food etc and even tracing back to the dawn of man since we begun to progress. Progression usually has drawbacks too. Continue eating those microwave dinner and see if you don't develop some abnormalities. And it doesn't take much progression too; remember what Hayes said about the animals, "If you take five grains of salt, divide this weight by five thousand, that is the amount of atrazine that causes these abnormalities." Ed Rosenthal also said, 'All kinds of stress induce plants to become hermaphrodites. These include irregular light cycle, water stress, and some chemicals. Hermaphroditism is also a genetic trait that indicates even without stress.' Many of these spin offs of progression could be the factor as seen in the plants and animals; and though the number of hermaphrodites reported are low, I believe they are many more who are afraid to let it known.


Two, which is the side I'm more leaning to for present times, it could be a deliberate action to mock God, discredit his word, advocate homosexuality and help provide the catalyst for the new age (do what thou will.). When I was speaking to someone in a cyber group on transgendering after she was cornered, see exclaimed, 'what about hermaphrodites, God made mistake [haha, because that's not in his book - bible].' From this I could see the underline agenda satan's plot. Similar to when an incurable STD's was deliberately injected into black males in Los Angeles; which Bill Clinton, president at the time, openly apologized. No one would have known it was deliberate if it wasn't exposed. They would have thought the 'good-for-nothing' black males are so promiscuousand irresponsible with their sexuality.


Do you know what they will be able to do because of the completion of the genetic mapping? You can literally have a custom made baby the natural way. Choose the color of the hair, skin etc and more other remarkable things. Imagine an Afro-American baby born with green or purple hair. We will see what is called in X-men, mutants, as scientists continue to play God. One could then put these and the current cases hermaphrodites under the category, "man shall do great things".


Therefore, hermaphrodites could be results of our ever advancing chemical achievements and/or the deviant scientific minds that couldn't resist to experiment. These abnormalities are not rare, scientist have being doing these thing in secret for years. I could show you pictures of many abnormalies in the world and many are due to scientific involvement and the rest to demonic intervention; things you wouldn't begin to believe.


I could go on with this, but since the number of hermaphrodites are growing, and they're been notice, I think it wise not to uncover other truths. They are human beings too and my suggestion to any is that you choose the sex that you are more incline to, have a corrective surgery to that end, then live your normal life. The stances that God has on any human being are the same stance he has for hermaphrodites. Homosexuality is still homosexuality, transgendering is still transgendering, fornication is still fornication and sin is sin across the boards; once you have the capacity to think and reason (intelligence). After you've made the decision to be a man/woman continue in that path, though many change later, reason being that choice was made for them at birth or as a child.


But if this choice was made by you given all factors involved, then stick with it and don't plan to do anything God does approve of. It's kind of a complex situation. But they're still humans and should still be born again. God loves them and he still cares for them and wants them to be save as well. Sex doesn't really matter in the new kingdom (heaven) for the scripture teaches us that in this new kingdom there is neither male nor female. Therefore, though you might be abnormal physically, your soul is not and it must be accounted for. God is more concern with your heart and that it be inclined to him. If you're a hermaphrodite, don't follow 'some' who go about being transvestives, posing for porn movies or any such thing. Don't use your situation to justify sinning. For instance, you choose to be a man by all factors involved, but later on you decide you want to sleep with a man and have anal sex. To support this you would use the 'herms card' to justify it because you have a femining side. No! That's sin and the consequences you will reap [the same can be said about cross dressing or unwed sexual activities]. If I felt like robbing the national bank, being that my father was an ardent thief, do I use genetics to justify 'wiping out' the national reserve? Saying, "I have a theifing genetic make up so it's okay, besides I'm destitute and an ex-vietnam soldier." No! I'll be punished by God and man.








If you're a hermaphrodite, God loves you, he wants you to be saved and like any human being, anyone who is not shall inherit an unhappy eternity.
Reply:A-sexual.
Reply:Ther is no oppsite
Reply:I'd guess..."Asexual"?
Reply:Anil is right -- unisexual. Dioecious plants have only one sex (dioecious is from the Greek meaning 2 houses -- separate plant for each sex).
Reply:A diecious species
Reply:totally sexless,hermaphrodite has everything
Reply:Not sure that there has been a person born with neither sexual organs. I will have to Google that.
Reply:my sister
Reply:ANDROID.
Reply:male and female (separately)
Reply:someone with no sex organs
Reply:how can it monocot lordazzo13?


nor monoecious- it means male and female flower groeing on same plant.


it is unisexual for sure which means having only type of flower.
Reply:asexual or nonsexual,


a·sex·u·al Pronunciation (-sksh-l)


adj.


1. Having no evident sex or sex organs; sexless.


2. Relating to, produced by, or involving reproduction that occurs without the union of male and female gametes, as in binary fission or budding.


3. Lacking interest in or desire for sex.


a·sexu·ali·ty (-l-t) n.


a·sexu·al·ly adv.








Adj.1.nonsexual - not havning or involving sex; "an asexual spore"; "asexual reproduction"


asexual











But. as for a true antonym it does not have one. This may be a trick question by your teacher.
Reply:Monocot (monocotyledonous)





A cotyledon is a significant part of the embryo within the seed of a plant. Upon germination, the cotyledon usually becomes the embryonic first leaves of a seedling. The number of cotyledons present is one characteristic used by botanists to classify the flowering plants. Species with one cotyledon are called monocotyledonous (or, "monocots") and placed in the Class Liliopsida. Plants with two embryonic leaves are termed dicotyledonous (dicots) and placed in the Class Magnoliopsida.
Reply:hismaphrodite
Reply:Gender Neutral
Reply:i`m sorry don`t have the answer but is not asexual asexual- lackingsex orfunctional sex organs
Reply:hermaphrodite has both sexes.so the opp would have to be asexual......
Reply:a unich...sorry asexual for fauna
Reply:unlucky
Reply:A hermaphrodite is a person who has both sets of gonads testes and ovaries, so the "opposite" would be someone who has one set or a male or female. Sorry I only know people not plants.
Reply:Neuter.

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What is the name of a deep orange flower with purple pistils?

The flower was growing in my backyard. It has a touch of purple at the base of each petal. The stem is thick and has hairs on it. The leaves have some fines hairs on them and they also have little needles at the end of each section. I assume it is to protect it from being eaten by bugs or animals.

What is the name of a deep orange flower with purple pistils?
It does sound like a poppy but it would help if you described the flower shape %26amp; leaf shape. Poppies have very distinct flower shape, the leaves are tissue thin, the seed head forms an inverted cone with a "hat", and the buds are very fat and egg shaped.





If it is a poppy as everyone seems to think then this website should have a picture.
Reply:Honeysuckle!
Reply:sounds like a species of lily - we have them here in australia, but sorry, I don't know what they're called
Reply:HI, I think poppy is correct. But, I am not going to try to answer your question, I am going to advise that you also describe leaf and flower SHAPE!!! That is very important, also the general area of what country and climate you like in! I guarantee you will get better answers! Woogha/Bugsie
Reply:it could be a poppy, i have some in my yard, and they look like what you descirbe.
Reply:Oriental Poppies- they are a perrenial plant and are quite hardy. Stems exude a milky substance when cut that is an irritant. Because of this substance the flowers don't work well for cut flowers.


What is the meaning of 'sticky pistil'?

The pistil is part of the sexual organs of a flower. It is often sticky with nectar to attract pollinating insects. Any other meaning, which may exist, although I have never heard the phrase used, I leave to your imagination.

What is the meaning of 'sticky pistil'?
It's the self-titled CD by Woodstock '99 band "Sticky Pistil." "Fatboy" was one of the hits. :)


The style and the stigma of the pistil in Zea maize is normally referred to as the what?

Corn silk

The style and the stigma of the pistil in Zea maize is normally referred to as the what?
It IS called silk of the corn or maize.


The style in Zea mays (please note the correct botanical name of maize) is the longest in the plant Kingdom or in the flowering plants.At its base it is attached to the ovary.


This is not at al surprising as the plant is anemophilous or wind pollinated.( Anemos = wind ; Anemometer = An instrument to measure wind velocity.)


At its base it is attached to the ovary. It is the ovary only that turns in to corn. Botanically it is the fruit and the seed rolled in one.
Reply:The hair or silk that extends out of the end of the husk.





Amazing huh!?





I think each silk is connected to an ovary that becomes the kernel.
Reply:yeah, #1 is right on the money ... but it is not *that* amazing* ... like other grasses, maize is wind pollinated and the long styles are the plant's way of maximising reception of wind-borne pollen. It is kind of amazing in the sense that the styles are *way* more developed (longer) than in most other grasses.
Reply:#1 is quite right


How does a pollen grain get to the stigma of a pistil?

Pollination is the placement of the pollen on the stigma of the carpal. This pollen transfer can be accomplished by wind, insects, built in mechanical discharge, and man. Once the pollen lands on the stigma, a series of chemical reactions takes place allowing the pollen grain to begin producing a structure called the pollen tube. As this is happening, the generative nucleus will divide and produce 2 sperm nuclei. This pollen grain with the pollen tube and 3 nuclei is considered the mature gametophyte. The pollen tube will work its way through the style of the carpal and touch the micropyle of the ovule. Here the sperm nuclei will enter the embryo sac and fertilize the egg and the two polar nuclei; hence the term double fertilization. The fertilized egg (2N) will develop into the immature seed plant, while the (3N) central cell will develop into the endosperm or food storage area of the seed.

How does a pollen grain get to the stigma of a pistil?
This depends on the plant. Plants the have flowers use an intermediary. This could be an insect like a bee, butterfly, moth, fly...etc. Could also be a hummingbird. Flowers have evolved specific traits to attract a particular pollinator, so you can tell just from looking at them what would visit.





Plants that do not have flowers use the wind on land, or water currents in aquatic environments.
Reply:ANNA LOLLLL
Reply:It watches late-night Cinemax.

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What is the swollen part of the pistil called?

The swollen part of pistil is called Ovary. After fertilisation it changes into fruit.


Ovary is the female part of a flower.

What is the swollen part of the pistil called?
ovary.
Reply:go to
Reply:the stamen.


Is there only a single pistil per flower head?

Number of pistils per flower head varies in plants. In Custard apple there are numerous pistils per flower. In Hibiscus there are 5 pistils but they are fused together to from a single structure which protrudes out from the stamen tube.





Number of pistils per flower is an important character used for classification and identification of plant species.

Is there only a single pistil per flower head?
In most flowers, I think.
Reply:generally yes...i think so...


Does a flower really need to hold a pistil on its stamen in order to force it to pollinate?

Couldn't they work this out without armed violence?

Does a flower really need to hold a pistil on its stamen in order to force it to pollinate?
Here's the latest buzz! The anther to this question has a stigma attached to it, so I will try to be unpolitical about it ovule might get a pollination notice. We all know there is a seedy side to the plant world. (Hehe, there is a Morph-ia in my flower bed.)
Reply:HARDLY, I believe that honor is all yours! I am but a 'knave' to your Highness. Report It

Reply:i say, use a pistil, go to jail...
Reply:I am apollen by this question. It is none of your beesness. So buzz off.
Reply:Possibly
Reply:They like it a little rough now and then.
Reply:it been a long time hasn't it
Reply:Jeez lady, save the X rated talk for the bedroom. There are children on this site. =P Now I'm going to have the image of throbbing pistils and whatnots all day.
Reply:Wit should lead to wit, not end at the first wit.


Can you list and define the three parts of the pistil? ( part of a flower )?

The pistil itself is formed from the stigma, style, and ovary.





The stigma is usually the terminal portion that has no epidermis and is fitted to receive pollen (male gametophytes).





The style is a stalk connecting the stigma with the ovary below containing the transmitting tract, which facilitates the growth of the pollen tube and hence the movement of the male gamete to the ovule.





The ovary contains the female reproductive cell or ovule.

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The ______________ is the sticky surface at the top of the pistil; it traps and holds the pollen??

stigma





pistil





ovary





none of the above

The ______________ is the sticky surface at the top of the pistil; it traps and holds the pollen??
do your own homework please
Reply:the stigma. it is also known as the place where fertilization process starts. did u know that the whole pistil shows that the flower is a female. those are all the female parts.
Reply:omg do you're own worrrrkkkkk! tbh i dont have a friggin clue but - it already used 'pistil' so its not that. Why on earth would it be ovary when its on about plants????? And i never think 'none of the above' is a good choice. So what are you left with?? And i study Music not friggin Science aaaaaaaaaaaarg.


What is the function of a style (In a Pistil, in a flower)?

It is a tube like structure that holds up the stigma and leads down to the ovary that contains the ovules.The sperm from the pollen grain travels down the style and fuses with the ovules.It also raises the stigma away from the ovary to decrease the likelihood of pollen contamination.

What is the function of a style (In a Pistil, in a flower)?
To receive the pollen o.o


5 plants: Identify the locations of the following parts of a flower: sepals, petals, stamens, and pistil.?

What, you can't find these answers in an encyclopedia or are you trying to test us poor folks?





Zoosha


What advantage to diversity are the position of the pistil and stamen?

the pistil or carpel is in the middle of the flower so that it id the first thing the insect gets to when pollinating


the stamens are at the side so that the bee rubs against them when reaching for the nectaries

What advantage to diversity are the position of the pistil and stamen?
You are asking about the relative positions of the stigma and the anthers ... this position is important in maximizing cross-pollination and thus maintaining genetic diversity. Plants do this in various ways. Here are a couple of examples:


1. At least some species of the Lipstick Plant (Gesneriaceae) have flowers with the anthers at the top of the tubular flower while they release their pollen (which is picked up on the heads of pollinators -- see pic at link), then the style moves up into the same position while the stamens drop down. Now the stigma is receptive to pollen on the heads of other pollinators that have visited flowers at the earlier stage. You can see the swap taking place in the top pic at the second link.


2. Distyly -- this is where a species has flowers of two different kinds, one with long styles and short stamens and another with short styles and long stamens. The thing is that the short style needs pollen from the short stamens and the long style needs pollen from the long stamens. There are some nice pics of the two kinds most of the way down the page at the 3rd link (yellow flowers).

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What is the part of many plants that contains a pistil and a stamen?

the flower

What is the part of many plants that contains a pistil and a stamen?
Bisexual flower.
Reply:flower
Reply:Petals?
Reply:The flower
Reply:the pistil is female part containing the stigma,style, and ovary. the stamen is the male part containing the anther and filament. both are within the corolla which is part of the perianth


What is the name of the part of the carpel (pistil) in which the ovules develop?

the ovary


Where did the name for pistil (Carpel) originate from/ whats the story behind it?

Where did the name for pistil (Carpel) originate from/ whats the story behind it?


Wasn't here this day of notes :/


thanks!

Where did the name for pistil (Carpel) originate from/ whats the story behind it?
Pistil or gynoecium of a flower is MADE UP of carpels.





So Pistil and Gynoecium are synonyms. Given below are the dictionary meanings of 1) Pistil and 2) Carpel





1) PISTIL ==The female, ovule-bearing organ of a flower, including the stigma, style, and ovary.





[French, from New Latin pistillum, from Latin, pestle (from its shape).]





2 ) CARPEL==One of the structural units of a pistil, representing a modified, ovule-bearing leaf.





[New Latin carpellum, from Greek karpos, fruit.]





carpellary car'pel·lar'y (-pə-lĕr'ē) adj.





It is important no note that carpel is a structural unit of pistil not the whole pistil .





Now let us see what the dictionary says about Gynoecium





3) GYNOECIUM==The female reproductive organs of a flower; the pistil or pistils considered as a group.





[New Latin, alteration (influenced by Greek oikos, house) of Latin gynaecēum, women's apartments, from Greek gunaikeion, from neuter of gunaikeios, of women, from gunē, gunaik-, woman.]





That means pistil = Gynoecium.
Reply:Pistils are sometimes known as carpels.


Carpel comes from the Greek word karpos, meaning fruit, the suffix el is a diminution or something that denotes small


Pistil comes from the Latin pestle, which connotes that the pistil (carpel) is shaped like a pestle (as in mortar and pestle)


Where did the name for pistil originate from/ whats the story behind it?

Where did the name for pistil (Carpel) originate from/ whats the story behind it?


ty

Where did the name for pistil originate from/ whats the story behind it?
Pistil and Carpels are NOT synonyms. You have to be careful here.





Pistil or gynoecium of a flower is MADE UP of carpels.





So Pistil and Gynoecium are synonyms. Given below are the dictionary meanings of 1) Pistil and 2) Carpel





1) PISTIL ==The female, ovule-bearing organ of a flower, including the stigma, style, and ovary.





[French, from New Latin pistillum, from Latin, pestle (from its shape).]





2 ) CARPEL==One of the structural units of a pistil, representing a modified, ovule-bearing leaf.





[New Latin carpellum, from Greek karpos, fruit.]





carpellary car'pel·lar'y (-pə-lĕr'ē) adj.





It is important no note that carpel is a structural unit of pistil not the whole pistil .





Now let us see what the dictionary says about Gynoecium





3) GYNOECIUM==The female reproductive organs of a flower; the pistil or pistils considered as a group.





[New Latin, alteration (influenced by Greek oikos, house) of Latin gynaecēum, women's apartments, from Greek gunaikeion, from neuter of gunaikeios, of women, from gunē, gunaik-, woman.]





That means pistil = Gynoecium.

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What does a 6 day old pistil look like compared to when the flower first opened?

It looks like 60 plus woman as compared to a twenty beauty.





What a stupid question? There is no mention of the plant involved.


Can a pistil shrimp create temperatures near the photosphere of the sun?

Yes. It's "pistol" rather than "pistil."





There is lots of information available about pistol shrimp. Just do an internet search on "pistol shrimp."


What is the difference between carpel and pistil?

The female part of the flower is referred to either as the carpel or the pistil. What is the difference between these two terms?

What is the difference between carpel and pistil?
A typical flower has the following parts and their individual component.





1) Calyx = The outer most floral whorl , usually green in color.


the individual components are Sepals ( All sepals together form Calyx)





2 ) Corolla = It is inner to calyx . Usually attractively colored.The individual components are called Petals ( All petals together form corolla.)





3 ) Androecium = It is the third floral whorl in the sequence . It is commonly refereed to as the Male Reproductive Whorl and its individual components are called Stamens . The anther at the top produce Pollen Grains.( All stamens together form Androecium )





4 ) Gynoecium OR Pistil = It is the last and the inner most floral whorl . The individual members are called Carpels . The ovary at the base contains ovules that turn in to seeds after pollination and fertilization. ( All carpels together form Gynoecium or Pistil )





So , Pistil == All the carpels taken together == Gynoecium.





Pistil may be monocarpellary ( Only one carpel )





Or it may be polycarpellary ( Many carpels)








This is just basic information limited to the question asked.





A diagram is on the link below , just click it --


http://www.sccs.swarthmore.edu/users/00/...
Reply:The easiest way to teach the concept of carpel is to start with the pea pod


(nearly always available for dissection at the local supermarket) which, as


you know, is a simple pistil, composed of a single carpel. Students can


easily cut open the pea pod and fold it back to show the leaf-like nature


of the carpel, with ovules attached at the margins of the leaf. Then I


suggest that they take five pea pods and bundle them together with a rubber


band to simulate fusion. Then we notice the kinds of "clues" one can look


for to determine carpel number in a pistil/fruit: number of "scallops" on


the ovary, number of style/stigma branches, and number of locules in the


ovary.











There is a clear need for keeping the two terms, carpel and pistil. They


are not synonymous except in the case of the simple pistil, composed of a


single carpel
Reply:The carpel and pistil are the same exact thing, pistil is more of a layman term.