Prolactin Is a Hormone Whose Molecular Structure Has Remained Stable

Multiple Choice

Prolactin is a hormone whose molecular structure has remained stable over evolutionary time but whose hormonal role has changed dramatically in different animal species. This is an excellent example of how evolution

A) is responsible for mutation in vertebrates.
B) occurs rapidly at the molecular level to keep up with changing environmental influences.
C) has stayed within narrow boundaries in regard to regulation of homeostasis.
D) can both preserve unity and promote diversity.