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.

Question

Quizplus · Accepted Answer

Prolactin's stable molecular structure demonstrates the preservation of unity in evolution, while its changing role in different animal species displays the promotion of diversity. This shows that evolution can both maintain continuities and facilitate adaptations.

Prolactin Is a Hormone Whose Molecular Structure Has Remained Stable