Cell biology
Cell theory, membranes, division and organelles.
Review and practiseBIOLOGY SL · Learning hub
Biology SL
Use biological terminology precisely and connect evidence to mechanisms.
Understand before you practise
Key concepts
Use this map to choose a concept, then move directly into the matching practice.
Molecular biology
Water, biomolecules, enzymes, DNA and cell respiration.
Review and practiseGenetics
Inheritance, probability and gene expression.
Review and practiseEcology
Ecosystems, energy flow, nutrient cycling and climate change.
Review and practiseEvolution and biodiversity
Evidence for evolution, natural selection, classification and conservation.
Review and practiseHuman physiology
Gas exchange, hormonal control and homeostasis.
Review and practiseStructured progression
Revision Ladder
Start with foundations, then move through application and challenge. Stages use activity marks and complexity.
Stage 1
Start stage Foundation
Recall core ideas and establish reliable methods.
82 activities availableStage 2
Start stage Apply
Connect concepts and apply them in exam-style contexts.
38 activities availableStage 3
Start stage Challenge
Tackle the highest-mark, multi-step activities available.
2 activities availableProgress dashboard
Topic practice
Recommended next: Cell biology
01
Cell biology
Not startedCell theory, membranes, division and organelles.
0%0/20 complete
02Molecular biology
Not startedWater, biomolecules, enzymes, DNA and cell respiration.
0%0/20 complete
03Genetics
Not startedInheritance, probability and gene expression.
0%0/20 complete
04Ecology
Not startedEcosystems, energy flow, nutrient cycling and climate change.
0%0/22 complete
05Evolution and biodiversity
Not startedEvidence for evolution, natural selection, classification and conservation.
0%0/20 complete
06Human physiology
Not startedGas exchange, hormonal control and homeostasis.
0%0/20 complete
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This is unofficial beta practice under accuracy, provenance, and rights review. Use the latest official subject guide to confirm syllabus coverage and examination requirements.