The answer to this question is lactic acid. The reason why sports psychologists would need to look for a buildup of this chemical is because it is the chemical that produces pain or "feeling the burn" in an exercise when someone pushes their limit. Also, after so long, a person with a lactic acid buildup needs to take a break because high levels of lactic acid is dangerous for the bloodstream.
Answer:
The organism at location D is the common ancestor
to organisms at location A, B, and C.
Explanation:
Hi! This is your answer because the organism at location D is at the very beginning of the cladogram thus passing on traits to organisms A,B, and C.
Hope this works for you.
Answer:
polarity is the answer.
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The first blank is trophic