Which label identifies the part of the ATP molecule that changes when energy is released in the cells of all living things? (A) X
(B)
(C)
(D)

Give examples of animals that live in sea and are considered mammals. ♡

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.

How can scientists test their ideas about the origin of the universe if they can't physically interact with or study?