Scientist study index fossils so they will get an understanding of what life was like back then.
The answer should be advantame
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Explanation:
In the upper thermosphere, atomic oxygen (O), atomic nitrogen (N), and helium (He) are the main components of air.
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Living
Explanation:
To function the brain send out signals to optimize and regulate the body and that's what makes you a living organism
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A point mutation is a change in the base sequence of a DNA molecule.
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