Are chemical messengers that can travel through the bloodstream and tell cells in the body what to do. they are very important in maintaining homeostasis.

metamorphism is the change of minerals or geologic texture (distinct arrangement of minerals) in pre-existing rocks (protoliths), without the protolith melting into liquid magma (a solid-state change). the change occurs primarily due to heat, pressure, and the introduction of chemically active fluids. i hoped i !

the answer is a) cell division.

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b. to discover aspects of the natural world.

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