SELECT * FROM question_mgmt as q WHERE id=124 AND status=1 SELECT id,question_no,question,chapter FROM question_mgmt as q WHERE courseId=3 AND subId=7 AND chapterId=39 and ex_no='1' AND status=1 ORDER BY CAST(question_no AS UNSIGNED)

Question: The second trophic level in a lake is-
(a) Phytoplankton
(b) Zooplankton
(c) Benthos
(d) Fishes

Answer:

(b) Zooplankton

Zooplankton are primary consumers in aquatic food chains that feed upon phytoplankton. Therefore, they are present at the second trophic level in a lake.


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