Which marine ecosystem has the highest mean net primary productivity?
a. continental shelf
b. estuaries
c. kelp beds and reefs
d. open ocean
e. upwelling zones
ANSWER: c
Biology & Microbiology
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a. fungi, animals, prokaryotes, or protists b. all of the choices c. chemoheterotrophs d. decomposers
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Which of the following human extraembryonic
membranes forms the urinary bladder? a. amnion b. yolk sac c. chorion d. allantois e. none of these
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Where the thermocline forms is indicated by
a. A. b. B. c. C. d. D. e. none of these
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Of the following, which is a proposed explanation for an observation?
a. principle b. law c. theory d. fact e. hypothesis
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