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9.3 Material cycles and decomposition

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Question 8

Researchers use outdoor soil tanks to investigate the loss of nitrate ions from soil as nitrogen gas.

Which treatment would favour the bacteria responsible for this change?

[1]
A

Adding nitrifying bacteria to the soil

B

Growing legumes with root nodules in the soil

C

Installing drains to remove excess water

D

Allowing the soil to remain waterlogged

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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