Why is it important to evaluate sources before gathering them ?

Groups of organisms with low biotic potential, such as gray whales, that produce at most one offspring every other year a) are r-selected b) are k-selected c) are not subject to density-dependent limiting factors d) show the initial stages of the extinction process e) have escaped from the processes of natural selection and adaptation

In this case, the statement that people who exercise for an hour may have lower cholesterol levels is .

Which is one example of a phenotypic change that is not genetic