Zebra mussels have been successful invasive species in the Great Lakes because they
A. can survive in dam rivers, which restrict natural river flow.
B. have no natural enemies.
C. destroy wetlands.
D. arrived in the ballast water of a European ship.
E. suck the blood out of almost any kind of fish.
Answer: B
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Proconsul was a dryopithecine. Indicate whether the statement is true or false
The ability of an ecosystem to replenish itself leads to
A) sustainability. B) decreasing consumptive use. C) the conversion of ecosystem capital from one form to another. D) increasing natural resources but declining ecosystem capital.
Wave base is:
a. the level of a wave trough. b. the level of a wave crest. c. one half the wavelength. d. twice the wave period. e. sea level.
Chief among the mineral deposits in Europe is ________________, which is found in Sweden, France, and Ukraine.
-bauxite -nickel -copper -dolomite -iron ore