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6.1 Monitoring and maintaining the environment

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Question 29
H

A student uses capture-recapture to estimate the number of woodlice under logs in a wood.

Which change to the method would make the estimate more accurate?

[1]
A

leaving enough time for marked woodlice to mix back into the population

B

catching the second sample straight away so that no marked woodlice die

C

catching the second sample from a different wood to avoid any bias

D

using a bright paint so that marked woodlice are easier to see later

Markscheme

6.1 Monitoring and maintaining the environment Questions

  1. GCSE
  2. /Biology
  3. /6.1 Monitoring and maintaining the environment

109 exam-style questions on OCR GCSE Biology 6.1 Monitoring and maintaining the environment, covering 6.1.1 Field investigation of distribution and abundance, 6.1.2 Human interactions and biodiversity, 6.1.3 Maintaining biodiversity, and 6.1.4 Environmental change and distribution of organisms. Each one has a worked solution and a mark scheme showing where the marks go.

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