Question

Explain double fertilization in plants...??

Don't copy from Google...

Answer 1

$\huge\mathfrak\red{Answer :}$


After pollination when pollen grains reach the stigma then stigma secret some liquid substance.... Pollen grains absorb that liquid substance and germinate to form pollen tube.. This pollen tube grows longer and longer and ultimately reach the ovule.

Now each pollen grain release two male gamates in the pollen tube. These male gamates travel through the pollen tube and reach the ovule.

When one male gamate fuse with egg then this process is known as Fertilization. And this type of process in plants is known as Syngamy...

When the male gamate fuse with two daughter nuclei then it is known as Triple fusion..

Since the fertilization occurs two times in plants. So, it is known as Double Fertilization in Plants.

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Answer 2

after pollen grain is depositedon the stigma,it must germinate and grow the style to reach the ovule.this microspore,or the the pollen,contain two cells:the pollen tube cell and the generative cell.The pollen cell grows into a pollen tube further the generative cell divides into two sperm cell, one sperm cell fertillizes the egg cell and the other fuses with the two polar nuclei
these two fertilisation at a same time is called double fertilisation