NEET BIOLOGY

Detailed explanation-1: -The nucleus of the microspore divides mitotically into a vegetative and a generative cell, the latter of which divides into two sperm nuclei.

Detailed explanation-2: -The second division is concerned with generative cell only. This division may take place either in pollen grain or in the pollen tube and gives rise to two male gametes. So, the correct answer is ‘Generative cell’.

Detailed explanation-3: -The generative cell divides by mitosis and gives rise to the 2 male gametes.

Detailed explanation-4: -pollen development The process begins with the meiosis of the microsporocyte to form four haploid microspores. The nucleus of each microspore then divides by mitosis to form a two-celled organism, the pollen grain, that contains a tube cell as well as a smaller generative cell.