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9.1 Ecosystems and interdependence

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Question 13

Surveyors place 9 randomly selected quadrats, each with an area of 0.4 m2, in a meadow. They count 72 buttercup plants altogether.

They then place one further quadrat, with an area of 0.75 m2, in the meadow.

How many buttercup plants in this further quadrat would give the same population density as the mean for the meadow?

[1]
A

8 buttercup plants

B

15 buttercup plants

C

20 buttercup plants

D

6 buttercup plants

Markscheme

9.1 Ecosystems and interdependence Questions

  1. GCSE
  2. /Biology
  3. /9.1 Ecosystems and interdependence

82 exam-style questions on Edexcel GCSE Biology 9.1 Ecosystems and interdependence, covering 9.1.1 Levels of organisation in ecosystems, 9.1.2 Abiotic and biotic factors, 9.1.3 Importance of interdependence, 9.1.4 Parasitism and mutualism, and 9.1.5 Determining number of organisms in an area. Each one has a worked solution and a mark scheme showing where the marks go.

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