When a muscle cell demands energy to contract, what happens to atp? a. atp makes more atp. b. atp is hydrolyzed and turns into adp c. atp is phosphorylated. d. atp is shuttled to the mitochondria

Which conditions are necessary for natural selection to occur? select all of the answers that apply. a. inheritable adaptations vary among individuals. b. the population size is increasing. c. more individuals are born than can survive. d. fitness varies among individuals. e. the environment changes suddenly and drastically.

Name the part of the the brain labeled "e".

Pl as time goes by and water goes through the water cycle again and again, the amount of water on earth: increases decreases ostays the same goes up and down