Biodiversity is believed to be greatest when a habitat experiences
A. regular disturbances that are not too extreme.
B. occasional large disturbances.
C. no disturbances.
D. either A or B
Answer: A
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The first major transgression onto the North American continent is recorded in rocks of the
_______ Sequence. Fill in the blank(s) with the appropriate word(s).
A cubic centimeter each of quartz, olivine, and native gold weighs 2.5, 3.0, and 19.8 grams, respectively. These weights indicate that ________
A) gold has a higher density and specific gravity than quartz and olivine B) olivine melts at a higher temperature than either gold or quartz C) gold is 6 to 7 times harder than olivine and quartz D) gold and olivine qualify as silicates, but quartz would not
The depth to which a bivalve can bury itself depends on the ________
A) composition of the sediment B) length of its siphon C) oxygen content of the sediment D) turbidity of the surface water E) wave frequency and water velocity
These two countries ended the colonial period with civil wars between Soviet-supported Marxist forces and U.S.-supported pro-Western forces
A) Angola and Mozambique B) Namibia and Botswana C) Rwanda and Burundi D) Nigeria and Biafra E) Ghana and Cote d'Ivoire