What happens to hormonal secretion of a certain hormone in a negative feedback loop if the level of that hormone falls below its set point

Marianne is comparing two animals: a fruit fly and a fruit bat. she asks, "do a fruit fly and a fruit bat share a common ancestor in their evolutionary history? " according to evolutionary theory, what is the answer to marianne's question?

19. scientists use meteorites that hit earth to provide evidence of the composition of earth's interior because they hypothesize that

What are genotypes? what are phenotypes?