B20: Homeostasis and Response
B20-1: Homeostasis
50 mins | medium
B20-2: The Nervous System
55 mins | medium
B20-3: Reflex Actions
55 mins | medium
B20-4: Required Practical Reaction Time
60 mins | medium
B20-5: The Brain HT
55 mins | hard
B20-6: The Eye
55 mins | medium
B20-7: Eye Problems
50 mins | medium
B20-8: Control of Body Temperature
50 mins | medium
B20-9: Human Endocrine System
55 mins | medium
B20-10: Control of Blood Glucose
55 mins | hard
B20-11: Diabetes
50 mins | medium
B20-12: Hormones in Reproduction
55 mins | medium
B20-13: Contraception
50 mins | medium
B20-14: Fertility Treatments
50 mins | medium
B20-15: Homeostasis Assessment
50 mins | hard
B21: Inheritance Variation Evolution
B21-1: Sexual and Asexual Reproduction
50 mins | medium
B21-2: Meiosis
55 mins | hard
B21-3: DNA and Genome
55 mins | medium
B21-4: DNA Structure HT
55 mins | hard
B21-5: Genetic Inheritance
55 mins | hard
B21-6: Punnett Squares
55 mins | hard
B21-7: Inherited Disorders
55 mins | medium
B21-8: Sex Determination
50 mins | medium
B21-9: Variation
50 mins | medium
B21-10: Evolution by Natural Selection
55 mins | medium
B21-11: Selective Breeding
50 mins | medium
B21-12: Genetic Engineering
55 mins | hard
B21-13: Cloning
50 mins | medium
B21-14: Evidence for Evolution
50 mins | medium
B21-15: Extinction
45 mins | medium
B21-16: Antibiotic Resistance
50 mins | medium
B21-17: Classification
50 mins | medium
B21-18: Inheritance Assessment
55 mins | hard
B22: Ecology
B22-1: Communities
50 mins | medium
B22-2: Abiotic Factors
50 mins | medium
B22-3: Biotic Factors
50 mins | medium
B22-4: Adaptations
50 mins | medium
B22-5: Food Chains and Levels
50 mins | medium
B22-6: Required Practical Field Investigation
60 mins | medium
B22-7: Pyramids of Biomass
50 mins | medium
B22-8: Biomass Transfer HT
55 mins | hard
B22-9: Biodiversity
50 mins | medium
B22-10: Human Impact on Biodiversity
50 mins | medium
B22-11: Land Use and Deforestation
50 mins | medium
B22-12: Global Warming
50 mins | medium
B22-13: Maintaining Biodiversity
50 mins | medium
B22-14: Ecology Assessment
50 mins | hard