A level of organization within the biosphere is a group of interacting individuals belong to one species and living in the same geographic area is a population.
Blood vessels in the ear dilate or constrict to help regulate body temperature.
Explanation:
I think The Natural selection is the process in nature by which organisms better adapted to their environment tend to survive and reproduce more than those less adapted to their environment. For example, treefrogs are sometimes eaten by snakes and birds
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