AP BIOLOGY

Detailed explanation-1: -It is the process of formation of microspores from a pollen mother cell through meiosis division. The cells of sporogenous tissues undergo meiotic division to form microspore tetrad. As the anther mature and dehydrate, the microspore dissociate and develops into pollengrains.

Detailed explanation-2: -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. The pollen grain is surrounded by an elaborate cell wall.

Detailed explanation-3: -It undergoes two successive meiotic divisions to result in the formation of the microspore tetrad. Meiosis halves the number of chromosomes. Hence, the four microspores formed are haploid in nature. This process of development of haploid microspores from diploid microspore mother cell is known as microsporogenesis.

Detailed explanation-4: -Microspores are haploid, and are produced from diploid microsporocytes by meiosis.

Detailed explanation-5: -Microsporogenesis in the anther involves the meiotic division of pollen mother cells, which each produce four microspores. These then undergo mitosis to form pollen grains (microgametophytes), which at maturity consist of only three cells, the tube cell and two non-motile sperm cells.