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.
Biology D4.1.1
D4.1.1 Natural selection as the mechanism driving evolutionary change
Biology D4.1.2
D4.1.2 Roles of mutation and sexual reproduction
Biology D4.1.3
D4.1.3 Overproduction of offspring and competition for resources
Biology D4.1.4
D4.1.4 Abiotic factors as selection pressures
Biology D4.1.5
D4.1.5 Differences between individuals in adaptation, survival and reproduction
Biology D4.1.6
D4.1.6 Requirement that traits are heritable for evolutionary change to occur
Biology D4.1.7
D4.1.7 Sexual selection as a selection pressure in animal species
Biology D4.1.8
D4.1.8 Modelling of sexual and natural selection
Biology D4.1.9
D4.1.9 Concept of the gene pool (HL)
Biology D4.1.10
D4.1.10 Allele frequencies of geographically isolated populations (HL)
Biology D4.1.11
D4.1.11 Changes in allele frequency in the gene pool (HL)
Biology D4.1.12
D4.1.12 Differences between directional, disruptive and stabilizing selection (HL)
Biology D4.1.13
D4.1.13 Hardy–Weinberg equation and calculations of allele or genotype frequencies (HL)
Biology D4.1.14
D4.1.14 Hardy–Weinberg conditions (HL)
Biology D4.1.15
D4.1.15 Artificial selection by deliberate choice of traits (HL)