What happens to the density of air as altitude decreases? A. The density of air decreases.

B. The density of air stays the same.

C. The density of air changes randomly.

D. The density of air increases.

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

There are six elements that make up most of the human body. which of the following is not one of these six elements?

Complete the possible outcomes for each generation in the pedigree chartaa aa aa