What is speciation?
the way that most species become extinct
the process by which new species are formed
the adaptations that an organism fit into its environment
the mutations that take place in an organisms dna

What is an animal that lives by preying on other animals

In what for do plants utilize nitrogen? why do they need nitrogen?

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.