That would be a, chemical to mechanical
Answer:
Species accumulate their unique features rapidly, then change little for the duration of the species.
Explanation:
It would be completely false to say that both internal and external environments can modify or alter a gene. The correct option among the two options that are given in the question is the second option or the last option. I hope that this answer has come to your great help.
I just copped me some free points yadaadadda