A tidal barrage would be used to generate electricity
A) at the mouth of a bay.
B) at the bottom of a large lake.
C) near the tip of an ocean peninsula.
D) in the open ocean.
Question 2
Why are there so few ecosystems with more than four levels of consumers?
A) Biomass decreases by about 90 at each trophic level, moving upward.
B) Top consumers compete with and kill each other with increasing population size.
C) Consumers at these highest trophic levels typically form social groups that stop reproducing at high densities.
D) Predators at the highest trophic levels simply are not intelligent enough to hunt other top predators.
Snout and mouth of sand tiger shark, showing protruding teeth and small eyes
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Koplik spots in the mouth of a patient with measles.
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