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Q1-Q8:Multiple Choice The Gulf of Mexico “dead zone” is the result of 

What factor usually sets a species’ upper limit in the rocky intertidal?

Successful reproduction of marine mammals and large sea birds in the eastern Pacific depends heavily on seasonal upwelling that brings nutrients to the surface where they can fuel growth of the phytoplankton that feed zooplankton, that in turn feed fish.

Q27-Q32: In the following 8 questions, choose “A”  if the statement applies best to planktotrophic larvae, or  “B” if the statement applies best to lecithotrophic larvae. Which would do best traveling in a current with an abundance of phytoplankton. 

Seagrass meadows rarely exhibit zonation of the dominant plant species because

Sea otters maintain their warm body temperature in the cold water in which their kelp forest ecosystem thrives by

 whales 

Salt marshes in some places along the Gulf of Mexico coast are drowning (i.e., failing to keep pace with sea level rise) due to

Diversity of space-holding organisms decreases if the chief predator on the competitive dominant is removed 

sea otters