Multiple choice

Which of the following does not characterise the food chain?

  1. Herbivores occupy more than one trophic level.

  2. Typically there are 4 or 5 trophic levels in a food chain.

  3. Usually 80 to 90% of potential energy is lost.

  4. There is unidirectional flow of energy among the trophic levels.
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A Correct answer
Explanation

In a food chain, omnivores occupy more than one trophic level and some organisms grab different trophic positions in different food chains.

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