How do sand dunes move? a. ocean waves b. weathering of old rocks in the desert c. the wind carries the sand until it runs into an obstacle d. gravity

What happens during the heat transfer within earth

Which statements are true of a scientific theory but not a hypothesis

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.