The answer to the given question above would be FOUR. The number of copies of a DNA molecule that results from two replications of a single DNA molecule is FOUR. Since there are two replications, this makes the DNA molecule four. Hope this answers your question.
Answer:
genes
Explanation:
the puppy got half their mother's chromosomes and half their dad's chromosomes therefore inheriting parts of their genes
Answer:
Gas exchange during respiration occurs primarily through diffusion. Gas molecules move from a region of high concentration to a region of low concentration. Blood that is low in oxygen concentration and high in carbon dioxide concentration undergoes gas exchange with air in the lungs.
Explanation:
Coronary
arteries supply blood to the heart muscle, The left one, arises from the aorta and
feeds blood to the left side of the heart and the right one supplies blood to
the right ventricle, the right atrium, and the SA (sinoatrial) and AV
(atrioventricular) nodes, which regulate the heart rhythm.
Blockage
in this vessel result in
<span>reducing
the flow of oxygen and nutrients to the heart muscle and that can lead to a
heart attack. Atherosclerosis and arteriosclerosis are the most common causes
of heart disease.</span>
