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IB Biology HL A2.3.6 Hl Rapid Evolution in Viruses Questions

Practise IB Biology HL A2.3.6 by explaining how rapid mutation and replication in RNA viruses generate variation that can benefit viral evolution.

Syllabus
First assessment 2025
Course
Biology HL
Level
HL

Exam points

  • Explain why RNA-virus replication and reverse transcription can produce rapid mutation when proofreading is absent.
  • Relate recombination or horizontal gene transfer, short generation times and high reproduction rates to rapid viral evolution.
  • Use viral genetic variation, natural selection and immune escape to explain antigenic change and effects on vaccines or secondary immune responses.

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Study A2.3.6 (HL)—Rapid evolution in viruses conceptsOpen the corresponding Concept lesson for explanations, examples and exam connections.

IB Biology HL A2.3.6 Hl Rapid Evolution in Viruses Questions question 1

[Maximum number: 2]

Pathogens are disease-causing organisms.

Outline two reasons for the very rapid rates of evolution in some viruses.

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