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Date November 2016 Marks available 3 Reference code 16N.2.SL.TZ0.5
Level Standard level Paper Paper 2 Time zone TZ0 / no time zone
Command term Distinguish Question number 5 Adapted from N/A

Question

Living organisms have been placed in three domains: archaea, eubacteria and eukaryote. Distinguish archaea from eubacteria.

[3]
a.

List two types of evidence used to determine which species belong in the same clade.

[2]
b.

Markscheme

Award [1] for each correct row.
Award reasonable distinctions even if not strictly contrasted.

a.

a. DNA/base sequences (of a gene/genes)

b. amino acid sequences (in a protein/proteins)

Do not credit references to morphology.

b.

Examiners report

[N/A]
a.
[N/A]
b.

Syllabus sections

Core » Topic 5: Evolution and biodiversity » 5.3 Classification of biodiversity
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Core » Topic 5: Evolution and biodiversity
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