What two organisms did Darwin observe on the island? And explain what he noticed about each.

What are chlorofluorocarbons made of

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.

Which of the organisms listed below performs nitrogen fixation? a. legumes b. plants c. bacteria d. fungi