The answer is A.
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Answer:
Evolution
Explanation:
Whenever a species changes over a period of time, it's called Evolution, which is (normally) driven by Natural Selection.
Pyruvate and NADH act as electron carries
Their safety is dangerous when they don't use a common measurement is because they don't know what are safe amounts of this dangerous chemical for them to use. Because they're using dangerous chemicals without a common measurement - this obviously puts them at risk.
<span>As altitude increases, temperature decreases.
As altitude increases, temperature increases.
As altitude increases, temperatures remain the same.
As altitude increases, temperatures vary.</span>
