It is d. If it was adaptation, the organism would have stayed in order to adapt. The species moved in order to not go extinct. It can not be speciation, because a new species was not made. It is stimulus. It experienced too much heat, so it left.
Answer:
<em>Involuntary </em><em>physiologic</em><em> </em><em>processes</em>
Answer:
those best suited to demands of environment survive
Answer:
the pepsin produces pepsinogen and the pepsinogen also peptides
