Biology Theory (Extended)
153 questions, 153 sorted into topics. Paper 4, written questions, Extended tier.
Topics
Characteristics and classification of living organisms
Characteristics of living organisms · Concept and uses of classification systems · Features of organisms
Organisation of the organism
Cell structure · Size of specimens
Movement into and out of cells
Diffusion · Osmosis · Active transport
Biological molecules
Biological molecules
Enzymes
Enzymes
Plant nutrition
Photosynthesis · Leaf structure
Human nutrition
Diet · Digestive system · Physical digestion · Chemical digestion · Absorption
Transport in plants
Xylem and phloem · Water uptake · Transpiration · Translocation
Transport in animals
Circulatory systems · Heart · Blood vessels · Blood
Diseases and immunity
Diseases and immunity
Gas exchange in humans
Gas exchange in humans
Respiration
Respiration · Aerobic respiration · Anaerobic respiration
Excretion in humans
Excretion in humans
Coordination and response
Coordination and response · Sense organs · Hormones · Homeostasis · Tropic responses
Drugs
Drugs
Reproduction
Asexual reproduction · Sexual reproduction · Sexual reproduction in plants · Sexual reproduction in humans · Sexual hormones in humans · Sexually transmitted infections
Inheritance
Chromosomes, genes and proteins · Mitosis · Meiosis · Monohybrid inheritance
Variation and selection
Variation · Adaptive features · Selection
Organisms and their environment
Energy flow · Food chains and food webs · Nutrient cycles · Populations
Human influences on ecosystems
Food supply · Habitat destruction · Pollution · Conservation
Biotechnology and genetic modification
Biotechnology and genetic modification · Biotechnology · Genetic modification