OBJECTIVE LIFE SCIENCE
ECOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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What is a characteristic of the deep water zone in lakes?
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The muddy bottom of the lake
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Shallow area of soil and water where emergent plants grow.
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In very deep lakes no sunlight penetrates this zone which results in low oxygen levels.
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In open water sunlight allows phytoplankton to perform photosynthesis.
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Explanation:
Detailed explanation-1: -Various zones of a lake are littoral zone (shallow water zone ), limnetic zone (of variable depth upto which light can penetrate), dark zone, i.e, profundal zone and bottom called benthic zone .
Detailed explanation-2: -As the profundal zone is below the level of light penetration sufficient for photosynthesis, photosynthesis does not serve as an oxygen source in that zone.
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