D4.1 Natural selection

Master D4.1 Natural selection with International Baccalaureate (IB) Biology exam-style questions, flashcards, lessons, and notes. All resources are aligned with the International Baccalaureate (IB) syllabus and designed for both SL and HL students.

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D4.1.1 Natural selection as the mechanism driving evolutionary change

D4.1.2 Roles of mutation and sexual reproduction

D4.1.3 Overproduction of offspring and competition for resources

D4.1.4 Abiotic factors as selection pressures

D4.1.5 Differences between individuals in adaptation, survival and reproduction

D4.1.6 Requirement that traits are heritable for evolutionary change to occur

D4.1.7 Sexual selection as a selection pressure in animal species

D4.1.8 Modelling of sexual and natural selection

D4.1.9 Concept of the gene pool (HL)

D4.1.10 Allele frequencies of geographically isolated populations (HL)

D4.1.11 Changes in allele frequency in the gene pool (HL)

D4.1.12 Differences between directional, disruptive and stabilizing selection (HL)

D4.1.13 Hardy–Weinberg equation and calculations of allele or genotype frequencies (HL)

D4.1.14 Hardy–Weinberg conditions (HL)

D4.1.15 Artificial selection by deliberate choice of traits (HL)

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