Mary travelled 70 miles/hour due north.

This is an example of

A) acceleration.
B) distance.
C) speed.
D) velocity.

A(n) is a molecule influences the way that a molecule reacts.

How do the evolutionary chart and the video support the claim that all living things are made up of cells?

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.