1.Sexual Reproduction in Flowering Plants
normal

આવૃત બીજધારીમાં નરજન્યુ ........... ના વિભાજનથી ઉત્પન્ન થાય છે.

A

જનનકોષ

B

વાનસ્પતિક કોષ

C

લઘુબીજાણુ માતૃકોષ

D

લઘુબીજાણુ

(AIPMT-2007)

Solution

(a) : In the pollen sac (microsporangium) of the anther, haploid microspores are formed by mitosis. Mitosis then follows to produce a two­ celled pollen grain with a small generative cell and a large vegetative cell. This generative cell will undergo further mitosis to form two male gametes (nuclei). The pollen tube grows through a spore in the pollen grain, with the tube (vegetative) nucleus at its tips and the male nuclei behind.

Standard 12
Biology

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