The tendency to maintain a stable, relatively constant internal environment is called homeostasis. The body maintains homeostasis for many factors in addition to temperature. For instance, the concentration of various ions in your blood must be kept steady, along with pH and the concentration of glucose.
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Superposition
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Sedimentary rocks are deposited one on top of another. The youngest layers are found at the top of the sequence, and the oldest layers are found at the bottom.
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It's the lowest level of biological organization that can survive and reproduce as long as appropriate conditions are achieved.
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Placer mining can be less damaging to the environment than surface mines, as the sediment is returned to the water after the minerals have been extracted.
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James Watson and Francis Crick solved the structure of DNA. Rosalind Franklin and Maurice Wilkins, also contributed to this discovery.
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