9.1 Ecosystems and interdependence

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Question 18

A botanist records 64 orchid plants in eight equal-sized quadrats.

The mean population density is 16 orchid plants per $m2\mathrm{m}^2$ .

What is the area of each quadrat?

[1]

$m20.125\,\mathrm{m}^2$

$m20.5\,\mathrm{m}^2$

$m24\,\mathrm{m}^2$

$m28\,\mathrm{m}^2$

Markscheme

9.1 Ecosystems and interdependence Questions

GCSE
Biology
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.

Question bank·9.1 Ecosystems and interdependence