A4.1 Evolution and speciation

Master A4.1 Evolution and speciation 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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A4.1.1 Evolution as change in the heritable characteristics of a population

A4.1.2 Evidence for evolution from base sequences in DNA or RNA and amino acid sequences

A4.1.3 Evidence for evolution from selective breeding of domesticated animals and crop plants

A4.1.4 Evidence for evolution from homologous structures

A4.1.5 Convergent evolution as the origin of analogous structures

A4.1.6 Speciation by splitting of pre-existing species

A4.1.7 Roles of reproductive isolation and differential selection in speciation

A4.1.8 Differences and similarities between sympatric and allopatric speciation (HL)

A4.1.9 Adaptive radiation as a source of biodiversity (HL)

A4.1.10 Barriers to hybridization and sterility of interspecific hybrids (HL)

A4.1.11 Abrupt speciation in plants by hybridization and polyploidy (HL)

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