Thermohaline currents are density-driven currents that __________
a) are part of the conveyer-belt circulation
b) bring oxygen-rich water to the deep ocean
c) deposit nutrient-rich water on the surface
d) are vertical deep currents.
e) are all of the answers above
E
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The determination that a granite pluton is not intrusive into overlying sedimentary layers because there are pebbles of granite in the bottom-most layer is an application of the Principle of
A) Superposition. B) Inclusions. C) Cross-cutting relationships. D) Original Horizontality.
Fossil evidence of the links among Gondwana continents was compelling because the species shouldhave:a
been found over wide regions if they were able to migrate among continents. b. exhibited evidence of tolerance for climatic extremes. c. shown a mechanism for widespread dispersal. d. been found over wide regions and shown a mechanism for widespread dispersal. e. been found over wide regions, exhibited evidence of tolerance for climatic extremes and shown a mechanism for widespread dispersal.
Currently the rate of world population growth:
a) is climbing exponentially. b) is climbing arithmetically. c) is falling gradually. d) is plummeting as a result of development and birth control technologies.
Prokaryotes and eukaryotes are different in all of the following except ________.
A. having a nucleus B. the use of mitochondria C. the presence of organelles D. their appearance in the fossil record E. potentially being single-celled