How does evolutionary change occur?
A. It may involve horizontal gene transfer.
B. Through the modification of characteristics in a preexisting population.
C. It may involve vertical descent with mutation.
D. All of these choices are correct.
E. None of these choices are correct.
Answer: D
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a. ATP b. sucrose c. glycine d. chlorophyll
Muscles exert force by
a. expanding in one direction. b. expanding in either of two directions. c. pushing in one direction only. d. pulling in one direction only. e. pushing or pulling.
Secondary succession is likely to occur in
a. a burned forest. b. a shallow lake. c. an abandoned field. d. a burned forest and a shallow lake. e. a burned forest, a shallow lake, and an abandoned field.
Which of the following can moderate climate by absorbing heat when the air is warm and releasing heat when the air is cold?
A) clouds B) glaciers C) mountains D) oceans