IB Biology Topic A4.1: Evolution and Speciation Notes

A4.1.1 Evolution as change in the heritable characteristics of a population

9 minute read

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

10 minute read

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

8 minute read

A4.1.4 Evidence for evolution from homologous structures

5 minute read

A4.1.5 Convergent evolution as the origin of analogous structures

8 minute read

A4.1.6 Speciation by splitting of pre-existing species

4 minute read

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

5 minute read

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

5 minute read

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

9 minute read

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

9 minute read

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

8 minute read