Sunday, April 12, 2009

Does pollination always take place inside the blooms of plants, flowers?

And can anyone give a simple version of the process of pollination?





I understand that bees , insects carry the pollen from one flower or plant to the other while in search of the nectar that blooms produce , and then after the pollen is placed on the bloom of another, how does it go from there?





thanks for your answers!
Say
FlowersBirthday FlowersSympathy FlowersThe highly compacted answer: The pollen from the stamens must reach the female part of the flower, the pistil. (either by wind or by pollinating insects or in some cases the flower does the job itself) The tip of the pistil is the stigma (think sticky). The pollen lands on the stigma and grows down the pistil%26#039;s style to the flower%26#039;s ovary where the eggs are located (ovules). Once it arrives in the ovary it fertilizes the egg. At this point the ovary (womb) begins changing. Simply, it becomes the fruit around the seeds. The seeds are the only part that are the result of the union between the male pollen and female eggs. When the eggs finish developing the fruit breaks, rots, dries and cracks whatever, releasing the seeds.
Reply:I think for ferns, pollination may occur on the ground, in water puddles, not sure about this (botany class was wayyyyyyy back in 1984).





As I recall, plant sexual reproduction was so different from animals, that it was hard to learn. for example, we are diploid, meaning we have paired sets of chromosomes, but for plants, they are haploid, one set of chromosomes. so that whole reproduction thing is necessarily different. You really need to get a book on this, or find a botany website.





seed scattering: air will disperse some (dandelion), animals eat berries with seeds, or nuts (strawberries have tiny seeds on the surface, acorns and other nuts), strawberry seeds are mostly indegestible, so the seeds sprout in animal dung, squirrels forget where they hide the acorns so some grow, jack pine cones will blow up in a forest fire, ejecting the seeds explosively, jewelweed has a built in spring loaded way to throw out its seeds. Thistles and other burrs stick to animal hides, then fall off later. Don%26#039;t forget water plants, their seeds can just float thru the water. A few ideas for you, there.
Reply:Well a lot of time birds and bees are part of it, but some plants have spores like ferns and they shoot them out, but like big trees such as pines, have cones and those have to drop a female cone (the large pine cone) onto the ground, and the smaller ones (the male cones) explode and hopefully a piece of them will fall into the female cone on the ground and a tree will grow. You can even pollinate flowers with a cue tip, I have to do this at home, it%26#039;s actually one of my chores, to pollinate the pear-apple tree because when i pollinate it, i will be producing more fruit. I don%26#039;t know if i answered your question, but that%26#039;s just some basic information...hope it helped!
Reply:corn_


male parts---pollen on tassels


female parts--silks on future ear of corn


pollen produced on tassels and moved by wind to the silks.


very simplified...


a pollen grain lands on a silk, travels down the silk which is a tube and fertilizes the female part and then develops into a kernel of corn.yahoo finance

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