It is body composition! Np Welcome :P
"The <span>amino acid acts as a corepressor" is the statement among the choices given in the question that is true. The correct option among all the options that are given in the question is the second option or option "B". I hope that this is the answer that has actually come to your great help.
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There are 4 thing that need to happen for natural selection to occur:
1) reproduction
2)heredity
3)variation in fitness or organisms
4)variation in individual characters of the population.
The answer would have to be D
