Biology Notes
Free chapter notes for Cambridge O Level Biology 5090. Read any chapter online, then practise with the member Workbook and revise with Chapter at a Glance.
Cell structure and function
Covers: Cell structure and function, Specialised cells, tissues and organs
Concept and use of a classification system
Covers: Concept and use of a classification system, Features of organisms
Diffusion and osmosis
Covers: Diffusion and osmosis, Active transport
Biological molecules
Covers: Biological molecules
Enzyme action
Covers: Enzyme action, Effects of temperature and pH
Photosynthesis
Covers: Photosynthesis, Leaf structure, Mineral nutrition
Uptake and transport of water and ions
Covers: Uptake and transport of water and ions, Transpiration and translocation
Diet
Covers: Diet, Human digestive system, Absorption and assimilation
Human gas exchange
Covers: Human gas exchange
Respiration
Covers: Respiration, Aerobic respiration, Anaerobic respiration
Circulatory system
Covers: Circulatory system, Heart, Blood vessels, Blood
Disease
Covers: Disease, Antibiotics, Immunity
Excretion
Covers: Excretion, Urinary system
Mammalian nervous system
Covers: Mammalian nervous system, Mammalian sense organs, Mammalian hormones, Homeostasis, Temperature control, Blood glucose control
Coordination and response in plants
Covers: Coordination and response in plants
Nuclear division
Covers: Nuclear division, Asexual and sexual reproduction, Sexual reproduction in plants, Sexual reproduction in humans
Variation
Covers: Variation, DNA, Inheritance, Selection
Biotechnology
Covers: Biotechnology, Genetic modification
Energy flow
Covers: Energy flow, Nutrient cycles, Ecosystems and biodiversity, Effects of humans on ecosystems, Conservation