Class 12 · Ecosystem

Energy Flow & Food Chains in Ecosystems — NEET Biology

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In an aquatic ecosystem, GFC is the major conduit for energy flow. As against this, in a terrestrial ecosystem, a much larger fraction of energy flows through the detritus food chain than through the GFC. Detritus food chain may be connected with the grazing food chain at some levels: some of the organisms of DFC are prey to the GFC animals, and in a natural ecosystem, some animals like cockroaches, crows, etc., are omnivores. These natural interconnection of food chains make it a food web. How would you classify human beings!

NCERT Biology · Class 12 · Chapter 12 · Paragraph 24
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Assertion (A): Energy flow patterns differ between aquatic and terrestrial ecosystems. Reason (R): In terrestrial ecosystems, the grazing food chain is the major conduit for energy flow, while in aquatic ecosystems, the detritus food chain dominates.

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