Answer:
a scientific theory of the origin of species of plants and animals
Not true, certain chemical transmitters stimulate certain receptors
Carbon dioxide
this is the answer
Answer:
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Explanation:
Metamorphic rocks started out as some other type of rock, but have been substantially changed from their original igneous, sedimentary, or earlier metamorphic form. Metamorphic rocks form when rocks are subjected to high heat, high pressure, hot mineral-rich fluids or, more commonly, some combination of these factors
