Which is not part of darwin's theory of natural selection?

a- some organisms are better suited to their environment.

b- some genes are better than other genes.

c -traits vary among members of a population.

d -organisms produce large numbers of offspring.

What sentence best supports the statement that hormones are involved in the regulation of homeostasis? a. the hormone erythropoeitin increases the production of red blood cells when oxygen levels are low. b. the hormone oxytocin promotes labor contractions of the uterus during childbirth. c. the hormone melatonin induces sleep and its production is slowed by exposure to light. d. the hormone cortisol suppresses the immune system and is produced when the body is under stress.