Biology 9700 · AS & A Level · Transport mechanisms

Transport mechanisms — practice question

In a freshwater food chain, which stage has the least efficient transfer of energy?

  • ALarge fishes feed on the small fishes.
  • BSmall fishes feed on the water fleas.
  • CUnicellular algae trap sunlight.
  • DWater fleas feed on the unicellular algae.

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