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7.4 Trophic levels in an ecosystem

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Question 23

In an area of tundra, 3.6 × 104 kg of biomass is transferred from dwarf willow plants to reindeer.

The efficiency of this biomass transfer is 9.0%.

What is the biomass available in the dwarf willow plants?

[1]
A

3.24×1053.24 \times 10^53.24×105 kg

B

4.0×1054.0 \times 10^54.0×105 kg

C

3.24×1033.24 \times 10^33.24×103 kg

D

4.0×1044.0 \times 10^44.0×104 kg

Markscheme

7.4 Trophic levels in an ecosystem Questions

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

103 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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