SL course

Biology SL

Biology SL practice for cells, genetics, evolution, ecology, physiology, data interpretation, and source-based biological reasoning.

Guided practice pathways

Assessment routes built from the live skills in this course. Each pathway moves from the first decision students need to make toward the kind of source use, calculation, writing, or judgement that costs marks in real assessment.

Science route

Unity and diversity

Start with the model or data, then practise calculation, graph interpretation, uncertainty, and explanation.

  1. Identify cell structures and their functions Build · 75 variants · visual · AI feedback
  2. Compare prokaryotic and eukaryotic cells Build · 75 variants · visual · AI feedback
  3. Classify biodiversity and use dichotomous keys Build · 75 variants · visual · AI feedback
  4. Evaluate biological investigation design and data Build · 75 variants · visual · AI feedback

A complete route ties the answer to evidence, units, and experimental reasoning.

Start pathway
Science route

Form and function

Start with the model or data, then practise calculation, graph interpretation, uncertainty, and explanation.

  1. Use membrane structure to explain transport Build · 75 variants · visual · AI feedback
  2. Use microscopy scale, magnification, and resolution Build · 75 variants · visual · AI feedback
  3. Explain DNA structure and replication Build · 75 variants · visual · AI feedback
  4. Analyse neurons, synapses, and signalling Build · 75 variants · visual · AI feedback

A complete route ties the answer to evidence, units, and experimental reasoning.

Start pathway
Science route

Interaction and interdependence

Start with the model or data, then practise calculation, graph interpretation, uncertainty, and explanation.

  1. Explain cell respiration and ATP transfer Build · 75 variants · visual · AI feedback
  2. Analyse population interactions and food webs Build · 75 variants · visual · AI feedback
  3. Explain transport systems in animals and plants Build · 75 variants · visual · AI feedback
  4. Explain homeostasis and feedback control Build · 75 variants · visual · AI feedback

A complete route ties the answer to evidence, units, and experimental reasoning.

Start pathway
Science route

Continuity and change

Start with the model or data, then practise calculation, graph interpretation, uncertainty, and explanation.

  1. Use gene expression and protein synthesis models Build · 75 variants · visual · AI feedback
  2. Use meiosis and genetic variation models Build · 75 variants · visual · AI feedback
  3. Predict inheritance patterns with Punnett diagrams Build · 75 variants · visual · AI feedback
  4. Explain hormones and reproductive biology Build · 75 variants · visual · AI feedback

A complete route ties the answer to evidence, units, and experimental reasoning.

Start pathway

Topics

Choose a topic to see the skills you can practise. Start with the area your class is studying now, or use the list to find weaker topics before a test or exam.

Unity and diversity IB Biology organizing theme: common ancestry, diversity, classification, and cellular/molecular unity. Form and function IB Biology organizing theme: structure-function relationships from molecules to ecosystems. Interaction and interdependence IB Biology organizing theme: exchange, signalling, systems, and ecological relationships. Continuity and change IB Biology organizing theme: inheritance, evolution, homeostasis, and response over time.