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Angiosperms

Angiosperms


Unlike the gymnosperms where the ovules are naked in the angiosperm in the flowering plants.the pollen grain ovules are developed in specialised structure called flower.


in the angiosperm the seeds are enclosed by fruits.The angiosperms are an exceptionally large groups of plants occurring in wide range of habits.They range in size of tiny.They provide us with food, fodder, fuel and medicines. The dicotyledons and the monocotyledons. The dicotyledons are characterised  by having to cotyledons in their seeds while the monocolyledons have only once.The only male sex organ in a flower is the stamen.each stamen consist of slender filament with an anther at tip. With in ovules are present highly reduce female gametophytes termed embryosacs.The embryosacs foration is proceed by meiosis.
The popular nuclei eventually fuse to produce diploid secondary nucleus. Pollen grains after dispersal from the anther are carried by the wind or various other agencies of the stigma of the pistil.This is termed as pollination.

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