Merrill has a buildup of plaque in his coronary arteries that encircle his heart and provide its muscles with oxygen and nutrients. merrill has

The correct answer is - Atherosclerosis.

Explanation:

Merrill has atherosclerosis condition that is characterized by the buildup of the plaque formation due to the cholesterol or fat deposition in or on the artery walls that can result in a restriction of blood flow.

It is a heart disease that can affect arteries by clotting blood or artery burst because of plaque deposition anywhere in the body. This is one of cause to trigger a heart attack.

Thus, the correct answer is - Atherosclerosis.

weathering is the answer.

genetic variation can be caused by mutation (which can create entirely new alleles in a population), random mating, random fertilization, and recombination between homologous chromosomes during meiosis (which reshuffles alleles within an organism's offspring).