Discussion
Assertion (A) : Phytoplanktons are also considered as grazing grounds for zooplanktons.
Reason (R) : Zooplanktons are not grazers.
Select the correct alternative using the codes below :
Answer: C
The answer is (A) is true but (R) is false.
Phytoplankton are the producers of aquatic food chains, and zooplankton feed on them; ecologists describe phytoplankton populations as the grazing grounds of the zooplankton, so the Assertion is true.
The Reason is false, because zooplankton are exactly the grazers in question: copepods, krill and other small animals graze on phytoplankton much as cattle graze on grass. A statement that contradicts the Assertion's own premise cannot explain it.
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