Videos for D4.1 Natural selection - IB
These comprehensive video lessons help IB Biology students Standard Level (SL) and Higher Level (HL) understand and master the essential concepts needed for success in IB Exams. Each video focuses on D4.1 Natural selection and is aligned with the IB Biology syllabus, ensuring focused learning on cell biology, genetics, and ecology. Students can watch and rewatch anytime, anywhere, perfect for visual learners, reinforcing complex concepts, and understanding IB methodology. By using RevisionDojo's video lessons consistently, learners build deep understanding and enter the exam with confidence.
4 min
Biology D4.1.1
D4.1.1 Natural selection as the mechanism driving evolutionary change
2 min
Biology D4.1.2
D4.1.2 Roles of mutation and sexual reproduction
2 min
Biology D4.1.3
D4.1.3 Overproduction of offspring and competition for resources
2 min
Biology D4.1.4
D4.1.4 Abiotic factors as selection pressures
1 min
Biology D4.1.5
D4.1.5 Differences between individuals in adaptation, survival and reproduction
3 min
Biology D4.1.6
D4.1.6 Requirement that traits are heritable for evolutionary change to occur
3 min
Biology D4.1.7
D4.1.7 Sexual selection as a selection pressure in animal species
3 min
Biology D4.1.8
D4.1.8 Modelling of sexual and natural selection
1 min
Biology D4.1.9
D4.1.9 Concept of the gene pool (HL)
1 min
Biology D4.1.10
D4.1.10 Allele frequencies of geographically isolated populations (HL)
2 min
Biology D4.1.11
D4.1.11 Changes in allele frequency in the gene pool (HL)
2 min
Biology D4.1.12
D4.1.12 Differences between directional, disruptive and stabilizing selection (HL)
1 min
Biology D4.1.13
D4.1.13 Hardy–Weinberg equation and calculations of allele or genotype frequencies (HL)
1 min
Biology D4.1.14
D4.1.14 Hardy–Weinberg conditions (HL)
1 min
Biology D4.1.15
D4.1.15 Artificial selection by deliberate choice of traits (HL)