Cell Division

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Questions and Answers

Microsporogenesis is the development of the egg-bearing gametophyte.

False (B)

Megasporogenesis is the development of the sperm-bearing gametophyte.

False (B)

The pollen sacs develop from the lobes of the anthers.

True (A)

Explain the difference between mitosis and meiosis.

Mitosis is the process of cell division in somatic cells, resulting in two daughter cells with the same number of chromosomes as the parent cell. Meiosis is the process of cell division in sex cells, resulting in four haploid daughter cells with half the number of chromosomes as the parent cell. Signup and view all the answers

What is the significance of polyploidy in plants?

Polyploidy refers to having multiple sets of chromosomes. In plants, polyploidy can lead to increased genetic diversity, adaptation to new environments, and the evolution of new species. Signup and view all the answers

Describe the alternation of generations in plants.

The alternation of generations in plants refers to the characteristic life cycle where there are two distinct generations - the haploid (1N) gametophyte and the diploid (2N) sporophyte. These generations alternate in their life cycle and can be either separate plants or stages within the same plant. Signup and view all the answers

What is heterospory and which groups of plants exhibit this trait?

Heterospory is the production of two different types of spores - microspores and megaspores. Flowering plants (angiosperms), gymnosperms, and several other major groups of plants exhibit heterospory. Signup and view all the answers

What are the male and female gametophytes in flowering plants called?

In flowering plants, the male gametophyte is called pollen and the female gametophyte is called an ovule. Signup and view all the answers

During microsporogenesis, what is the role of the tapetum?

The tapetum surrounds the microsporocytes and provides nutrients. Signup and view all the answers

What are the two main components of pollen?

The two main components of pollen are intine (cellulose) and exine (sporopollenin). Signup and view all the answers

Where does megasporogenesis occur in the flower?

Megasporogenesis occurs in the gynoecium, specifically in the ovary. Signup and view all the answers

What is the function of synergids in the mature embryo sac?

The synergids produce pheromone-like chemicals that attract sperm to the zone of greatest concentration in front of the egg cell. Signup and view all the answers

What is the process that leads to the formation of a triploid endosperm?

The process is called double fertilization, where one sperm fertilizes the egg and the other sperm unites with the polar nuclei. Signup and view all the answers

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