In areas with low infant mortality rates, women tend to have ____.
A. more children
B. poor education
C. insufficient nutrition
D. poor health
E. fewer children
Answer: E
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Phytoplankton are
a. plants. d. carnivore-scavengers. b. animals. e. heterotrophs. c. carnivores.
Alien invaders ________.
A. blend into the existing ecological community B. dominate the system and spread rapidly C. remain at low abundances for several decades D. persist for several decades and then disappear E. None of these is correct.
The highest rates of productivity in temperate waters occur in ________.
A. winter B. summer C. fall D. spring E. Productivity is the same during all seasons.
The objective of a species recovery plan is to
A. Invest corporate capital in species maintenance B. Interbreed threatened species with common species C. Increase an endangered species population until it is no longer endangered D. Study the species for a better understanding of its role in the biological community E. Protect the species to aid other organisms and resources in the ecosystem