. List at least three tasks that are a part of the job. Complete sentences are not necessary.

Adigestive system that is a series of tubes beginning at the mouth and ending at the anus is a digestive system.

What is the next step in muscle contraction after the actin changes shape? (apex)

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.