Salt marshes are ________ ecosystems, while mangroves are ________
A) benthic; freshwater tropical ecosystems
B) temperate intertidal; found on subtropical and tropical shorelines
C) tropical intertidal; found on temperate shorelines
D) freshwater; pelagic
E) dominated by kelp; found in coral reefs
B
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What happens to the volatile components after any oil spill?
A) They sink to the bottom sediments B) They evaporate into the air. C) They form balls of tar in the wave action. D) They assimilate by organisms.
Where is the greatest annual total oceanic primary productivity?
A) rocky intertidal zones B) in the temperate continental shelves C) in the northern polar regions D) productivity is about equal at all latitudes
With regards to particle transport by streams, the resisting forces include all of the following except
A) water depth. B) particle weight. C) friction with its neighbors. D) cohesion with its neighbors.
Plate tectonics is a result of Earth's internal heat engine, powered by
A. gravity B. the Sun C. heat flowing from Earth's interior outward