Type of sedimentary rock that forms when sediments stick together

Why is excretion necessary to maintain homeostasis?

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.

Guard cells control which event? the growth of plants capture of solar energy gas exchange in leaves water absorption in roots