Make the correct pair :
Column $- I$ | Column $- II$ |
A- Tapetum | i- Degenerate during development |
B- Intine | ii- Resistant organic materials |
C- Vegetative cell | iii- Pollen tube |
D- Sporopollenin | iv- Provide nourishment to pollen grains |
$(A-iv) (B-iii) (C-ii) (D-i)$
$(A-ii) (B-iv) (C-i) (D-iii)$
$(A-iv) (B-iii) (C-i) (D-ii)$
$(A-iii) (B-i) (C-iv) (D-ii)$
At the time of pollination, how many cells are formed in the pollen grains
Pollen grains can be stored for several years in liquid nitrogen having a temperature of
Even after killing the generative cell with a laser beam, the pollen grain of a flowering plant germinates and produces normal pollen tube because
The anther wall consists of four wall layers where
Exine of pollen grains is composed of