<span>Hormones move from one location to another through </span>THE BLOOD.
Answer:
Mitochondrial DNA is circular, so it doesn't shorten when it replicates unlike the rest.
It is relative dating because no scientist can tell the actually time that the layers of rocks where formed or when the fossil began to degrade
Answer: During vigorous exercise your breathing rate increases in order to intake more oxygen
Explanation: during vigorous exercise / activity the body needs more oxygen in order to produce energy so your breathing rate increases in order to reach the demand of more intake of oxygen , and your muscles work harder due to an increase in oxygen demand and how much oxygen the muscles take from the blood during vigorous exercises , BUT during rest we have normal rate of oxygen intake because your body is at rest at that moment .
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<span>If the liver cells of an animal have twenty-four chromosomes, the same animal would have twelve chromosomes in its sperm cells. Chromosomes are paired into two types, the X and Y components. The Y components are the sperm cells of an animal.</span>
