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6.4 Classification of living organisms

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Question 29
H

A proposed evolutionary tree has these features:

  • The lineage leading to R separated from the lineage leading to P and Q 24 million years ago.
  • P and Q separated from each other 8 million years ago.
  • A bone feature appeared in the lineage leading to P and Q 18 million years ago. It never appeared in R and was not subsequently lost.

A fossil is 12 million years old and has this bone feature.

Which placement is consistent with both its age and its structure?

[1]
A

On the P–Q lineage after separation from R but before the P–Q split.

B

On the R lineage after separation from P–Q but before the P–Q split.

C

On the P lineage after the P–Q split but before the present day.

D

On the ancestral lineage before separation of R from the P–Q lineage.

Markscheme

6.4 Classification of living organisms Questions

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

81 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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