Introduction:
The sea is divided into many zones, depending on the

Answer to Problem 30A
Correct Answer:
Option (B) limnetic zone.
Explanation of Solution
Explanation/justification for the correct answer:
Option (B) limnetic zone. The limnetic zone is the photic zone in the open sea. The effect of tides here is less. The limnetic zones are well lit and stable that provide the photosynthetic planktons to survive. Hence, it is the correct answer.
Explanation for incorrect answer:
Option (A) littoral zone. This zone has nutrients and the sunlight for planktons, but the water here is moving and unstable, and planktons cannot stay or long. Hence, it is an incorrect answer.
Option (C) profundal zone. The profundal zone does not have access to the light and the nutrients and oxygen are less here. Hence, it is not correct.
Option (D) aphotic zone. The aphotic zone lacks light and planktons needs light for photosynthesis. Hence, it is an incorrect answer.
Chapter 3 Solutions
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