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- The Investigation
- The new Investigation from 2025
- Dissection of an example investigation (IA)
- IA official assessment criteria
- IA teacher comments sheet
- IA Investigation 2025 - marking sheets
- IA - First examiner's report
- Communication in Biology IAs 2025
- Research design
- Data Analysis
- Conclusion
- Evaluation
- IA - Avoiding common errors
- IA uploads to the IBIS platform - simple guide
- Three ways to choose a topic for the IA
- 30 investigation ideas for Biology IA
- IA experiment ideas inspired by Youtube
- 6 Ecological ideas for your IA
- 16 new experiment ideas for Biology IA
- 12 Investigation ideas with a biological twist.
- Topic tests
- Molecules level topic tests (A1,B1,C1,D1)
- A1.1 Water - topic test
- A1.1 Water topic test - model answers
- A1.2 Nucleic Acids - topic test
- A1.2 Nucleic acids topic test - model answers
- B1.1 Carbohydrates & lipids - topic test
- B1.1 Carbohydrates & Lipids - model answers
- B1.2 Proteins - topic test
- B1.2 Proteins - model answers
- C1.1 Enzymes & Metabolism - Topic test
- C1.1 Enzymes & Metabolism - Model answers
- C1.2 Cell Respiration - Topic test
- C1.2 Cell respiration - model answers
- C1.3 Photosynthesis - topic test
- C1.3 Photosynthesis - model answer
- D1.1 DNA Replication - topic test
- D1.1 DNA Replication - model answers
- D1.2 Protein synthesis - topic test
- D1.2 Protein synthesis - model answers
- D1.3 Mutation & gene editing - topic test
- D1.3 Mutation & gene editing - model answers
- Cells level topic tests (A2,B2,C2,D2)
- A2.1 Origin of cells HL - topic test
- A2.1 Origin of Cells HL - model answers
- A2.2 Cell structure - topic test
- A2.2 Cell structure test - model answers
- A2.3 Viruses HL - topic test
- A2.3 Viruses HL - model answers
- B2.1 Membranes & transport - topic test
- B2.1 Membranes & transport - model answers
- B2.2 Organelles - topic test
- B2.2 Organelles - model answers
- B2.3 Cell specialization - topic test
- B2.3 Cell specialization - model answers
- C2.1 Chemical signalling HL - topic test
- C2.1 Chemical signalling HL - model answers
- C2.2 Neural signalling - topic test
- C2.2 Neural signalling - model answers
- D2.1 Cell division - topic test
- D2.1 Cell division - model answers
- D2.2 Gene expression - topic test
- D2.2 Gene expression - model answers
- D2.3 Water potential - Topic test
- D2.3 Water potential - Model answers
- Organism level topic tests (A3,B3,C3,D3)
- A3.1 Diversity of organisms - topic test
- A3.1 Diversity of organisms - model answers
- A3.2 Classification and cladistics HL - topic test
- A3.2 Classification and cladistics HL - model answers
- B3.1 Gas exchange - topic test
- B3.1 Gas exchange - model answers
- B3.2 Transport - topic test
- B3.2 Transport - model answers
- B3.3 Muscle and motility - topic test
- B3.3 Muscle and motility - model answers
- C3.1 Integration of body systems - topic test
- C3.1 Integration of body systems - model answers
- C3.2 Defence against disease - SL topic test
- C3.2 Defence against disease - model answers
- D3.1 Reproduction - topic test
- D3.1 Reproduction test - model answers
- D3.2 Inheritance - topic test
- D3.2 Inheritance - model answers
- D3.3 Homeostasis - topic test
- D3.3 Homeostasis - model answers
- Ecosystem level topic tests (A4,B4,C4,D4)
- A4.1 Evolution and speciation - topic test
- A 4.1 Evolution & speciation - model answers
- A4.2 Conservation of Biodiversity - SL topic test
- A4.2 Conservation of Biodiversity - model answers
- B4.1 Adaptation to environment - topic test
- B4.1 Adaptation to environment - model answers
- B4.2 Ecological niches - topic test
- B4.2 Ecological niches - model answers
- C4.1 Populations & communities - topic test
- C4.1 Populations & communities - model answers
- C4.2 Transfers of energy & matter - topic test
- C4.2 Transfers of energy & matter -model answers
- D4.1 Natural selection - topic test
- D4.1 Natural selection - model answers
- D4.2 Stability & change - topic test
- D4.2 Stability & change - model answers
- D4.3 Climate change - topic test
- D4.3 Climate change - model answers
- New-style 2025 Mock Exam papers