1. It can be inferred from the passage that the first theories ofgrazer control mentioned in the first paragraph would have beenmore convincing if researchers had been able to_____
observe high phytoplankton numbers undernatural lake conditions
discover negative correlations betweenalgae and zooplankton numbers from theirfield research
understand the central importance ofenvironmental factors in controlling thegrowth rates of phytoplankton
make verifiable correlations of cause andeffect between zooplankton andphytoplankton numbers
invent laboratory techniques that wouldhave allowed them to bypass their fieldresearch concerning grazer control
2. Which of the following, if true, would call intoquestion Hardys principle of animal exclusion?
Zooplankton are not the only organismsthat are affected by phytoplanktonrepellents.
Zooplankton exclusion is unrelated tophytoplankton population density.
Zooplankton population density is higherduring some parts of the year than duringothers.
Net phytoplankton are more likely toexclude zooplankton than arenannoplankton.
Phytoplankton numbers can be stronglyaffected by environmental factors.For the following question, consider each of the choices separately and select all that apply
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