Unselfish acts that help others in a group so that they increase their chances of surviving and reproducing is called
A) altruistic behavior.
B) selfish behavior.
C) natural selection.
D) inclusive fitness.
E) sexual selection.
Answer: A) altruistic behavior.
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a. nosocomial. b. opportunistic. c. nonpathogenic. d. immunogenic.
Anoxygenic photosynthetic bacteria
A. obtain electrons from water. B. do not produce oxygen as a by-product. C. may obtain electrons from H2S. D. are obligate aerobes. E. do not produce oxygen as a by-product AND may obtain electrons from H2S.
DNA replicates during the ________ phase of the cell cycle.
A) G1 B) G2 C) G3 D) S
What type of force moves water up a tree, from its roots to its leaves?
A) pushing B) pulling C) pumping D) positive pressure