When it rains, rainwater soaks into the ground and puts pressure on the existing water in the ground, forcing some o
it to move through natural cracks and openings in the rock until it reaches the surface and forms a(n)
An underground layer of permeable rock that is situated between two layers of impermeable rock so that water is
trapped within it is called a(n)

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.