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6.1 Monitoring and maintaining the environment

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Question 15
F

A student uses capture-recapture to estimate the number of beetles in a wood.

The student marks the beetles with a bright white paint spot. This makes the marked beetles easier for birds to see and eat.

What effect will this have on the estimate of the population size?

[1]
A

More marked beetles will be caught again, so the estimate will be too high.

B

Fewer marked beetles will be caught again, so the estimate will be too low.

C

Fewer marked beetles will be caught again, so the estimate will be too high.

D

The marked beetles will not mix with the others, so it will be too low.

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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