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9.3 Material cycles and decomposition

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Question 15

Young pine trees are planted to restore a disused quarry. The trees need nitrogen to produce amino acids as they grow.

What must their roots absorb to obtain this nitrogen?

[1]
A

Proteins in dead material

B

Nucleic acids in dead material

C

Nitrogen gas in air spaces

D

Nitrate ions in soil water

Markscheme

9.3 Material cycles and decomposition Questions

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

101 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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