Which statement would least likely be used to describe variation?
variations are inherited differences between individuals of the same species.
variations that decrease reproductive success are more likely to be passed on.
variations may result in changes to an entire population after many generations.
variations provide some individuals with an advantage.

In order to clone adult animals, scientists typically begin with a(n)

Which statement is true about the cell theory? a) it is well-supported by evidence. b) it is unchangeable and permanent.

Which of the following is the best definition of aerobic respiration? o a. the cellular process that releases energy by breaking down glucose o b. physical activity that involves the repeated motion of large muscle groups o c. physical activity that increases heart rate and breathing rate o d. the cellular process that converts solar energy to chemical energy