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D4.1.5—Differences in adaptation, survival, reproduction

Adaptation increases survival or reproductive success when a heritable trait improves performance under specific environmental conditions in evolving populations in evolving populations.

Syllabus
First assessment 2025
Objective
D4.1.5
Level
HL

Exam analysis

Chance of appearing2%of analysed past papers
Latest appearanceNovember 2024
Most common paperPaper1
Typical marks1–2

Common command terms

  • Outline
  • Compare
  • Describe

Recent exam appearances

November 2024Paper1 ["HL"] · TZ019[ 1 ]D4.1.5—Differences in adaptation, survival, reproduction
May 2017Paper3 ["HL"] · TZ21(b)[ 2 ]D4.1.5—Differences in adaptation, survival, reproduction
Practice this objective

Coverage 2017–2024 · Updated 16 Jul 2026

Concept essentials

  • Adaptations are heritable traits that improve performance in context.
  • Evolution depends on reproductive success, not survival alone.
  • The value of a trait can change when the environment changes.
ConceptIB Biology HL