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9.3 Material cycles and decomposition

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Question 21
H

A factory reduces its sulfur dioxide emissions. Several years later, more pollution-sensitive lichen species are present nearby.

Which additional evidence would most strengthen the conclusion that reduced pollution caused this change?

[1]
A

Sulfur dioxide measurements also fall while tree type and sampling method remain unchanged.

B

Sulfur dioxide measurements also rise while tree type and sampling method remain unchanged.

C

Tree species are replaced while sulfur dioxide measurements and sampling method remain unchanged.

D

Sampling effort is increased while sulfur dioxide measurements and tree type remain unchanged.

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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