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Question

The dominant second trophic level in a lake ecosystem consists of


A
The biotic components are almost similar
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B
The abiotic components are almost similar
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C
Primary and secondary consumers are similar
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D
Both biotic and abiotic components are different
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Solution

The correct option is A The biotic components are almost similar

In a food chain of the lake ecosystem, the producers are phytoplanktons and the consumers which directly depend on phytoplanktons for food are called primary consumers. These primary consumers in a lake ecosystem are basically zooplanktons, although it may include some fish that feed on the phytoplanktons. Therefore, the dominant second trophic level in a lake ecosystem consists of zooplanktons.


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