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8.1 Exchange surfaces and diffusion

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Question 24
H

Two model organisms are cubes. Model P has sides of 2 mm and model Q has sides of 6 mm. For a cube, surface area =6l2 and volume =l3=l^3=l3.

Compared with P, which statement describes Q?

[1]
A

It has three times the area and one third of the surface area to volume ratio.

B

It has nine times the area and three times the surface area to volume ratio.

C

It has three times the area and three times the surface area to volume ratio.

D

It has nine times the area and one third of the surface area to volume ratio.

Markscheme

8.1 Exchange surfaces and diffusion Questions

  1. GCSE
  2. /Biology
  3. /8.1 Exchange surfaces and diffusion

42 exam-style questions on Edexcel GCSE Biology 8.1 Exchange surfaces and diffusion, covering 8.1.1 Introduction to exchange and transport, 8.1.2 Alveoli adapted for gas exchange, 8.1.3 Factors affecting rate of diffusion, and 8.1.4 Rate of diffusion using Fick's law. Each one has a worked solution and a mark scheme showing where the marks go.

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