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9.3 Material cycles and decomposition

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Question 6
F

A student places moist dead leaves in a container with a supply of air. The carbon dioxide concentration in the outgoing air increases.

Which process causes this increase?

[1]
A

Photosynthesis by microorganisms on the leaves

B

Nitrification by microorganisms on the leaves

C

Transpiration from microorganisms on the leaves

D

Respiration by microorganisms on the leaves

Markscheme

9.3 Material cycles and decomposition Questions

  1. GCSE
  2. /Biology
  3. /9.3 Material cycles and decomposition

44 exam-style questions on Edexcel GCSE Biology 9.3 Material cycles and decomposition, covering 9.3.1 Cycling of materials through ecosystems, 9.3.2 The carbon cycle, 9.3.3 The water cycle, 9.3.4 The nitrogen cycle, 9.3.5 Indicator species and pollution, 9.3.6 Decomposition in preservation and composting, and 9.3.7 Rate changes in decay of biological material. Each one has a worked solution and a mark scheme showing where the marks go.

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