That would be C.
Endocrine secretion is when a molecule(usually a hormone) is secreted into the blood. Endo as “in” the blood. Exo as “out” of the blood. You can think of it that way if it helps:)
Natural selection could not occur without environment, and a act on animal.
The answer is <span>Reuptake.
Have a nice day :-)</span>
Answer:
killer T
Explanation:
helper T activates killer T cells which literally kill the virus or bacteria. memory T are the subset of an infection.
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