Negative feedback is a control system that helps the body maintain homeostasis by sending a signal to a response.

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.

In the practice of science, this type of reasoning is used to develop explanations.

Are gametes exactly the same? explain why or why not?