Yes, they are.
Minerals are the result of rock metamorphic cycles and other volcanic activities that result to these mixture of different minerals. Minerals can also be the cause of some biogeochemical cycles that occurs on the earth's different spheres.
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The stem transports nutrients made in the leaves to all parts in the plant.
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The answer should be Environmental Protection Agency, because its the agency US federal government into mission of protecting environmental health or human health
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Stem cells. Or more specifically, embryonic stem cells.