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7.4 Trophic levels in an ecosystem

7.4 Trophic levels in an ecosystem

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Question 33
H

Owls swallow small mammals whole. They later bring up pellets containing the bones and fur of the mammals.

Which statement about the biomass in an owl pellet is correct?

[1]
A

It was absorbed and then excreted, so it counts as a respiration loss

B

It was transferred to the owl and is available to the next trophic level

C

It was excreted as urea, so it is lost from the food chain as waste

D

It was ingested but never absorbed, so it was not transferred to the owl

Markscheme

7.4 Trophic levels in an ecosystem Questions

  1. GCSE
  2. /Biology
  3. /7.4 Trophic levels in an ecosystem

61 exam-style questions on AQA GCSE Biology 7.4 Trophic levels in an ecosystem, covering 7.4.1 Trophic levels, 7.4.2 Pyramids of biomass, and 7.4.3 Transfer of biomass. Each one has a worked solution and a mark scheme showing where the marks go.

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