Question

which of the following best describes meiosis?
a. it is carried out in all tissues that require cell replacement.
b. it occurs only in cells in the reproductive structures of organisms.
c. it happens in all tissues except the brain and spinal cord.
d. it is the first stage of mitosis.

Explanation:

To determine the correct answer, we analyze each option:

• Option A: Cell replacement is done by mitosis, not meiosis. So A is incorrect.
• Option B: Meiosis is the process of cell division that produces gametes (sex cells) and occurs only in the reproductive structures of organisms. This matches the definition of meiosis.
• Option C: Meiosis does not occur in most body tissues; it's specific to reproductive cells. So C is incorrect.
• Option D: Meiosis and mitosis are different processes, and meiosis is not a stage of mitosis. So D is incorrect.

Answer:

B. It occurs only in cells in the reproductive structures of organisms.