Question

In diploid organisms, which of the following undergoes meiosis?

• A. Vegetative cell
• B. Sporogenous tissue
• C. Pollen grain
• D. Synergids

Answer 1

The Correct Option is B

In diploid organisms, meiosis is the process by which haploid cells are produced from diploid cells. This reductional division is essential for sexual reproduction, ensuring that offspring have the same chromosome number as the parents. Let's evaluate the options provided to identify which undergoes meiosis: 

• Vegetative cell: Typically, these cells are involved in growth and maintenance of the organism. They undergo mitosis, not meiosis, to produce identical diploid cells.
• Sporogenous tissue: This tissue is involved in the formation of spores or gametes in diploid organisms. Its cells undergo meiosis to produce haploid spores or gametes necessary for sexual reproduction.
• Pollen grain: Pollen grains are a result of the process starting with meiosis, but the grain itself is already a haploid structure produced after meiosis has occurred in precursors like microsporocytes.
• Synergids: These are part of the female gametophyte, derived from the megaspore mother cell, which undergoes meiosis prior to forming the female gametophyte. The synergids themselves, however, do not undergo meiosis.

Therefore, sporogenous tissue undergoes meiosis to produce spores or other reproductive cells in diploid organisms.

Answer 2

• Meiosis is the process that reduces the chromosome number by half to form haploid cells from diploid cells.
• In diploid organisms, meiosis typically occurs in sporogenous tissue (in plants), where it gives rise to haploid spores. These spores then develop into the next generation.
• Vegetative cells, pollen grains, and synergids do not undergo meiosis. Vegetative cells and synergids are diploid cells, and pollen grains are typically formed by the process of mitosis (not meiosis).