School / IB / BIOLOGY SL Practice beta This is unofficial practice, not certified exam-board material.
Prefer 1:1 help? Register interest in a real Biology SL teacher →
IB IGCSE AS & A Level Overview Topics Revision Ladder Teacher help BIOLOGY SL · Learning hub
Biology SL About this subject Selected practice across the four current IB Biology themes (Unity and diversity, Form and function, Interaction and interdependence, Continuity and change). Selected topics only, not full syllabus coverage.
Topics & subtopics 01 Theme A: Unity and diversity Cell theory and prokaryote/eukaryote diversity, water and biomolecule properties, species classification, and evolution and biodiversity.
A1.1 Water A1.2 Nucleic acids A2.2 Cell structure A3.1 Diversity of organisms A4.1 Evolution and speciation A4.2 Conservation of biodiversity 18 questions Review and practise → 02 Theme B: Form and function Membrane structure and transport, organelle function, and structural adaptations for gas exchange, absorption and circulation.
B1.1 Carbohydrates and lipids B1.2 Proteins B2.1 Membranes and membrane transport B2.2 Organelles and compartmentalization B2.3 Cell specialization B3.1 Gas exchange B3.2 Transport B4.1 Adaptation to environment B4.2 Ecological niches 18 questions Review and practise → 03 Theme C: Interaction and interdependence Enzymes, cell respiration and photosynthesis, neural signalling, immunity, and energy and matter transfer within ecosystems.
C1.1 Enzymes and metabolism C1.2 Cell respiration C1.3 Photosynthesis C2.2 Neural signaling C3.1 Integration of body systems C3.2 Defense against disease C4.1 Populations and communities C4.2 Transfers of energy and matter 19 questions Review and practise → 04 Theme D: Continuity and change DNA replication and protein synthesis, cell division, inheritance, natural selection, homeostasis and climate change.
D1.1 DNA replication D1.2 Protein synthesis D1.3 Mutation and gene editing D2.1 Cell and nuclear division D2.3 Water potential D3.1 Reproduction D3.2 Inheritance D3.3 Homeostasis D4.1 Natural selection D4.2 Stability and change D4.3 Climate change 21 questions Review and practise → Structured progression
Revision Ladder Start with foundations, then move through application and challenge. Stages use activity marks and complexity.
Stage 1 Foundation Recall core ideas and establish reliable methods.
53 questions available 0/53 completed Start stage → Stage 2 Apply Connect concepts and apply them in exam-style contexts.
22 questions available 0/22 completed Start stage → Stage 3 Challenge Tackle advanced reasoning and multi-step questions.
1 questions available 0/1 completed Start stage → Progress dashboard
Topic practice Recommended next: Theme A: Unity and diversity
01
Theme A: Unity and diversity Not started Cell theory and prokaryote/eukaryote diversity, water and biomolecule properties, species classification, and evolution and biodiversity.
0% 0/36 complete →
02
Theme B: Form and function Not started Membrane structure and transport, organelle function, and structural adaptations for gas exchange, absorption and circulation.
0% 0/36 complete →
03
Theme C: Interaction and interdependence Not started Enzymes, cell respiration and photosynthesis, neural signalling, immunity, and energy and matter transfer within ecosystems.
0% 0/38 complete →
04
Theme D: Continuity and change Not started DNA replication and protein synthesis, cell division, inheritance, natural selection, homeostasis and climate change.
0% 0/42 complete →
When independent study is not enough
Get help from a real teacher. Tell us the subject and topic blocking your progress. We can source a suitable teacher in response to demand.
Register for teacher help Wrong level? Switch to BIOLOGY HL →
This is unofficial practice under accuracy, provenance, and rights review. Use the latest official subject guide to confirm syllabus coverage and examination requirements.
