Which statement is an accurate interpretation of the outcome in an ecosystem when a major predator is removed?
A. The diversity of the ecosystem decreases because new herbivores move in.
B. The diversity of the ecosystem decreases because parasites become more of a problem.
C. The diversity of the ecosystem actually increases.
D. The diversity of the ecosystem decreases since there is an increase in competition.
E. The remaining community adjusts and quickly becomes stable.
Answer: D
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The first known primates were characterized as
a. arboreal and nocturnal. b. ground-dwelling and nocturnal. c. arboreal and diurnal. d. ground-dwelling and diurnal. e. none of these.
The bright coloration of male birds is often the result of what?
(A) gene flow. (B) genetic drift. (C) sexual selection. (D) stabilizing selection. (E) coevolution.
The nonporous, flexible central region of a tracheid wall pit in conifers is called
a. resin duct b. torus c. end wall d. sorus e. xylet
Which of the following processes is correctly matched with its typical result?
a. Peristalsis - heartburn b. Mucus production - ulcers c. Parietal cell production of the components of HCl - diarrhea d. Chief cell secretion of pepsinogen - diarrhea e. Chyme backflow - heartburn