What is the result of mitosis in a unicellular organism

2. sketch the inside of the bean nodule, and describe or label what you observed with the hand lens.

Which of the following statements is true about the relationship between genetic variation and natural selection? a. genetic variation must be present in a population before natural selection can act on it. b. genetic variation arises in a population as a result of natural selection. c. natural selection can act on a population whether there is genetic variation within the population or not. d. after natural selection acts on a population, the amount of genetic variation in the population always increases.

This is a biological reaction due to a stimulus. i need this quickly !