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D4.3.12 (HL)—Evolution from climate change

Climate change can alter selection pressures, changing phenotype or allele frequencies when some variants survive and reproduce better over generations.

Syllabus
First assessment 2025
Objective
D4.3.12
Level
HL

Concept essentials

  • Climate change can create new selection pressures on survival and reproduction.
  • Heritable variants suited to warmer or altered conditions can increase in frequency.
  • Evolutionary change differs from short-term migration because allele or phenotype frequencies shift over generations.
ConceptIB Biology HL