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6.4 Classification of living organisms

6.4 Classification of living organisms

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Question 28
H

Species P and Q have similar body shapes and live in water. Species R has a different body shape and lives on land.

Comparisons of many corresponding DNA regions consistently show that P is more similar to R than to Q.

Which proposed tree and assessment of the evidence are best supported?

[1]
A

P branches with Q; their common habitat independently confirms their close ancestry.

B

P branches with Q; their common shape outweighs the evidence from many molecules.

C

P branches with R; their molecular similarities establish that R descended directly from P.

D

P branches with R; their molecular similarities can outweigh similarities in external shape.

Markscheme

6.4 Classification of living organisms Questions

  1. GCSE
  2. /Biology
  3. /6.4 Classification of living organisms

40 exam-style questions on AQA GCSE Biology 6.4 Classification of living organisms, covering 6.4 Classification of living organisms. Each one has a worked solution and a mark scheme showing where the marks go.

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