OBJECTIVE LIFE SCIENCE
ECOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Bacteria kill organisms in eutrophic lakes by reducing ____ dissolved in the lake
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Oxygen
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Food
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Bacteria
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Sunlight
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Explanation:
Detailed explanation-1: -The correct answer is under b. reducing oxygen dissolved in the water. There are a large number of bacteria in the water that feed on dead plants and animals, use oxygen and reduce its concentration, which leads to the death of animals who need oxygen to live.
Detailed explanation-2: -All the organisms in the food web, from zooplankton to crustaceans, insects, frogs, and fish, need oxygen to live, so they are excluded from the oxygen-depleted zones of the lake and their vitality is naturally constrained.
Detailed explanation-3: -Excessive nutrients lead to algal blooms and low-oxygen (hypoxic) waters that can kill fish and seagrass and reduce essential fish habitats.
There is 1 question to complete.