Cells spend most of their life
A. in the G0 phase.
B. dividing.
C. in metaphase.
D. undergoing differentiation.
A. in the G0 phase.
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Match the correct case study in conservation biology with its animal.
A. fruit bats—introduction of new species B. prairie chickens—loss of genetic diversity C. songbirds—introduction of new species D. whales—pollution E. Lake Victoria cichlids—loss of habitat
Most mammals excrete _____; most aquatic animals excrete _____; birds, insects, and many reptiles excrete _____
A. uric acid; urea; ammonia B. uric acid; ammonia; urea C. urea; uric acid; ammonia D. urea; ammonia; uric acid E. ammonia; urea; uric acid
What specialized mechanism allows submerged aquatic plants to disperse their pollen?
a. Heptophilous pollination b. Halophilous pollination c. Hydrophilous pollination d. Hydrophobic pollination
Which of the following is released by cells lining blood vessels and causes a decrease in blood
pressure? a. histamine b. acetylcholine c. cyclic AMP d. nitric oxide e. prostaglandin