Things going from low concentration to high concentration with ATP. An example would be the sodium potassium pump
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As a result of photosynthesis oxygen and sugar
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Natural selection leads to evolution.
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There are four principles at work in evolution—variation, inheritance, selection and time. These are considered the components of the evolutionary mechanism of natural selection.
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Answer: Vasodilation of the arteries lowers blood pressure and decreases the force that the heart muscle needs to exert to pump blood., the cell signaling mechanism begins when $NO$ diffuses into the smooth muscle cells of the blood vessel and activates guanylyl cyclase.
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