Which of these natural resources is nonrenewable?

a. sugarcane

b. sunlight

c. corn

d. oil or petroleum

What came first the elephent or the crocodile

Blood, made up of red and white blood cells, work together to form

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.