The fruits of legumes:
A. are fleshy and sweet and are dispersed by birds
B. are winged and dispersed by wind
C. split down both sides and the seeds fall out
D. have corky hulls that make them buoyant and are dispersed by water
E. have hooks that cling to mammals and are dispersed by them
C. split down both sides and the seeds fall out
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A previously unknown animal is being studied so that it can be classified. It is an invertebrate, triploblastic, dorsoventrally flattened, acoelomate, and has flame cells. Which phylum would you place it in?
A. Platyhelminthes. B. Mollusca. C. Arthropoda. D. Cnidaria.
With its claw removed, the male fiddler crab will be unable to mate; the claw is needed to ________
a. restrain the female while mating b. obtain prey to provide to the female c. confront predators who otherwise would attack the defenseless females d. attract females, who select males on the basis of claw size
The pathway on the left is named for what is
happening in the figure labeled with letter ____.
a. A b. B c. C d. D e. E
Which of the following processes does denitrification contribute to?
A) acid rain B) ozone depletion C) global warming D) acid rain, ozone depletion, and global warming