Une theory proposes that selecting for "pretty boys" isn't just superficial and can benefit a
species. Explain this theory.

answer; ///(b) it is composed of four protein chains and four heme groups;

the corpus luteum secretes estrogens and progesterone. the latter hormone causes changes in the uterus that make it more suitable for implantation of the fertilized ovum and the nourishment of the embryo. if the egg is not fertilized, the corpus luteum becomes inactive after 10–14 days, and menstruation occurs.

i hope this : )

the answer is c a tornado