Pricing Schools

IB
A4.1 Evolution and speciation

IB Biology Topic A4.1: Evolution and Speciation Lessons

Report an issue

A4.1 Evolution and speciation Lessons - IB Biology

Written by official IB examiners

Lessons for A4.1 Evolution and speciation - IB

This lesson delivers structured, step-by-step lessons that guide students through every part of the IB Biology syllabus for A4.1 Evolution and speciation. These lessons simplify complex ideas like molecular biology, evolutionary mechanisms, and homeostasis, while worked examples show how to approach IB-style questions.

Designed for both HL and SL learners, RevisionDojo lessons ensure students not only understand the theory but also know how to apply it in IB Paper exam situations.

With clear explanations, active learning checks, and a syllabus-first design, RevisionDojo makes revision less overwhelming and more effective.

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)

A1.1 Water

A1.2 Nucleic acids

A2.1 Origins of cells (HL)

A2.2 Cell structure

A2.3 Viruses (HL)

A3.1 Diversity of organisms

A3.2 Classification and cladistics (HL)

A4.1 Evolution and speciation

A4.2 Conservation of biodiversity