What is Rh incompatibility? Who is at risk?

Which pattern most likely came from a gunshot and which one was produced from a blow on the head? explain your answer?

Are substances released into the environment that in excess amounts cause damage

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.