Evolution resources
Biology, grade 12. Notes, worksheets, videos, interactive tools and revision materials for this chapter.
Notes
Study notes
The chapter's lessons are the notes — read them in order, then use the resources below.
01Natural SelectionExplain Darwin's theory step by step, with real examples like antibiotic resistance.Read lesson →02Evidence for EvolutionWeigh the fossil, anatomical, embryological and DNA evidence for common ancestry.Read lesson →03How Speciation HappensShow how isolation and selection split one species into two.Read lesson →04Classification and PhylogenyUse the taxonomic hierarchy and DNA data to build evolutionary trees.Read lesson →
Worksheets
Practice worksheet
Attempt every question before revealing the answer — that struggle is where learning happens.
Practice questions live inside each lesson — work through them there, then return for revision.
Videos
Watch and learn
Hand-picked searches to find a clear video explanation of each lesson.
Natural Selection — explainedYouTube search · opens in a new tabWatch →Evidence for Evolution — explainedYouTube search · opens in a new tabWatch →How Speciation Happens — explainedYouTube search · opens in a new tabWatch →Classification and Phylogeny — explainedYouTube search · opens in a new tabWatch →
Revision
Revision checklist
Can you explain each of these out loud, without looking? If not, re-read that lesson.
- Natural Selection: Explain Darwin's theory step by step, with real examples like antibiotic resistance.
- Evidence for Evolution: Weigh the fossil, anatomical, embryological and DNA evidence for common ancestry.
- How Speciation Happens: Show how isolation and selection split one species into two.
- Classification and Phylogeny: Use the taxonomic hierarchy and DNA data to build evolutionary trees.
- Read each lesson's summary and re-do its practice questions from memory.