Q. Which one of the following statements is wrong?
(a) When pollen is shed at two-celled stage, double fertilization does not take place.
(b) Vegetative cell is larger than generative cell.
(c) Pollen grains in some plants remain viable for months.
(d) Intine is made up of cellulose and pectin.
Solution :
Correct option : A When pollen is shed at two-celled stage, double fertilization does not take place.
In 60% angiosperms, the pollen grains are shed in 2 celled, 2 nucleate stage and further development of male gametophyte (Pollen grain) occurs on stigma it leads to formation of mature male gametophyte, 3 celled, 3 nucleated stage, which successfully participate in double fertilization.
