Thursday, February 9, 2012

How does the sperm of an angiosperm reach the egg?

A. via the pollen tube that grows through the carpel tissues from the pollen grain deposited on the stigma

B. via the pollen tube that grows through the female gametophyte from the pollen grain deposited at the mouth of the ovary 0%

C. usually via an insect, which places it in the ovary while probing for nectar

D. usually via an insect, which perforates the ovary wall while probing for nectar

E. via raindrops or a dew film, through which the sperm swims to the egg from the pollen grain deposited on the stigma

How does the sperm of an angiosperm reach the egg?
the sperm swims to the eggs to fertilize them

Sometimes a few seconds, sometimes a few days. It depends how fast the sperm is and how far along in the menstrual cycle the woman is
Reply:A.



Indeed, when the flower is pollinated by a insect bearing pollen, the pollen stick onto the stigma of the flower. Then the pollen grain grows down the style (carpel is female part of flower) into the ovary and then transfers genetic material to the ovule.

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