(E)They estimated the natural community grazing rates of zooplankton by using laboratory data concerning the grazing rates of individual zooplankton species.
27. Which of the following is a true statement about the zooplankton numbers and zooplankton grazing rates observed in Haney’s experiments?
(A)While zooplankton numbers began to decline in August, zooplankton grazing rates began to increase.
(B)Although zooplankton numbers were high in May, grazing rates did not become high until January.
(C)Both zooplankton numbers and grazing rates were higher in December than in November.
(D)Both zooplankton numbers and grazing rates were lower in March than in June.
(E)Both zooplankton numbers and grazing rates were highest in February.
答案 A D B C E C E D
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