Answer:hello!
Explanation:
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So the DNA can be copied to make more of themselves.<span />
The answer to your question is ''ice forming and then melting back into water''
Since living organisms require energy and both survival and reproduction... the sun provides the energy for photosynthesis. Cells need sugar as a sources of energy. The cellular respiration is the synthesis of ATP using energy that is being released by the breakdown of sugar to carbon dioxide and water.
The body needs to maintain the amount of oxygen that reaches our cells. If we exercise a lot, our breathing rate increases. More oxygen enables our cells to <span>more quickly respire aerobically, so that our muscles can contract more rapidly.
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