Topic 08Biology
A4.1 Evolution and speciation
Multiple lines of evidence for evolution; homologous vs analogous structures; and the mechanisms by which populations diverge into new species.
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Evidence for evolutionSign up
What evolution is, and the evidence we can measure · Homologous vs analogous — what bones reveal
30 min
Allopatric and sympatric speciationSign up
Speciation — splitting one gene pool into two · Allopatric vs sympatric — and the hybrid problem (HL)
30 min
Adaptive radiation + polyploidy (AHL)Sign up
Adaptive radiation — biodiversity bursts (HL) · Polyploidy — instant speciation in plants (HL)
30 min