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 A4.1 Evolution and speciation 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 A4.1.1
A4.1.1 Evolution as change in the heritable characteristics of a population
Biology A4.1.2
A4.1.2 Evidence for evolution from base sequences in DNA or RNA and amino acid sequences
Biology A4.1.3
A4.1.3 Evidence for evolution from selective breeding of domesticated animals and crop plants
Biology A4.1.4
A4.1.4 Evidence for evolution from homologous structures
Biology A4.1.5
A4.1.5 Convergent evolution as the origin of analogous structures
Biology A4.1.6
A4.1.6 Speciation by splitting of pre-existing species
Biology A4.1.7
A4.1.7 Roles of reproductive isolation and differential selection in speciation
Biology A4.1.8
A4.1.8 Differences and similarities between sympatric and allopatric speciation (HL)
Biology A4.1.9
A4.1.9 Adaptive radiation as a source of biodiversity (HL)
Biology A4.1.10
A4.1.10 Barriers to hybridization and sterility of interspecific hybrids (HL)
Biology A4.1.11
A4.1.11 Abrupt speciation in plants by hybridization and polyploidy (HL)