55 copepods, usually accounting for 80 percent of the
community grazing rate. These rates varied seasonally,
reaching the lowest point in the winter and early spring.
Haneys thorough research provides convincing field
evidence that grazers can exert significant pressure on
60 phytoplankton population.
1. It can be inferred from the passage that the first theories of
grazer control mentioned in the first paragraph would have been
more convincing if researchers had been able to
observe high phytoplankton numbers under
natural lake conditions
discover negative correlations between
algae and zooplankton numbers from their
field research
understand the central importance of
environmental factors in controlling the
growth rates of phytoplankton
make verifiable correlations of cause and
effect between zooplankton and
phytoplankton numbers
invent laboratory techniques that would
have allowed them to bypass their field
research concerning grazer control
【新gre逻辑阅读 每日一练2】相关文章:
最新
2016-03-01
2016-03-01
2016-03-01
2016-03-01
2016-03-01
2016-03-01