All Subjects
Biology
KS5 Year 13
Biology
KS5 Year 13
All Year Groups
KS2 Year 3
KS2 Year 4
KS2 Year 5
KS2 Year 6
KS3 Year 7
KS3 Year 8
KS3 Year 9
KS4 Year 10
KS4 Year 11
KS5 Year 12
KS5 Year 13
All Subjects
Maths
English language
Biology
Physics
Chemistry
Chapter Overview
Chapter Overview
Exam Board
Select an option
Practical skills
Ecosystems
Control systems
Origins of genetic variation
Modern genetics
Microbiology and pathogens
Energy for biological processes
Exchange and transport
Classification and biodiversity
Cells, viruses and reproduction of living things
Biological molecules
65 Lessons
390 Exercises
Practical skills
Experimental design and identifying variables
Length
Overview
Learning Goals
Overview
Learn
Processing and presenting data
Length
Overview
Learning Goals
Overview
Learn
Drawing conclusions and evaluations
Length
Overview
Learning Goals
Overview
Learn
Study Tips
Boost your skills with our essential study tips!
Ecosystems
Energy and ecosystems
Length
Overview
Learning Goals
Overview
Learn
Changes in ecosystems
Length
Overview
Learning Goals
Overview
Learn
Human effects on ecosystems
Length
Overview
Learning Goals
Overview
Learn
Control systems
See All (7)
Homeostasis and negative feedback
Length
Overview
Learning Goals
Overview
Learn
Chemical control in mammals
Length
Overview
Learning Goals
Overview
Learn
Chemical control in plants
Length
Overview
Learning Goals
Overview
Learn
The structure of the nervous system
Length
Overview
Learning Goals
Overview
Learn
Transmission of nerve impulses
Length
Overview
Learning Goals
Overview
Learn
Effects of drugs on the nervous system
Length
Overview
Learning Goals
Overview
Learn
Detection of light by mammals
Length
Overview
Learning Goals
Overview
Learn
Origins of genetic variation
Factors impacting genetic diversity
Length
Overview
Learning Goals
Overview
Learn
Inheritance: monohybrid, dihybrid and co-dominance
Length
Overview
Learning Goals
Overview
Learn
Modern genetics
See All (4)
Gene sequencing and genome projects
Length
Overview
Learning Goals
Overview
Learn
Factors affecting gene expression
Length
Overview
Learning Goals
Overview
Learn
Stem cells: Types and use in medicine
Length
Overview
Learning Goals
Overview
Learn
Recombinant DNA technology
Length
Overview
Learning Goals
Overview
Learn
Microbiology and pathogens
See All (7)
Culturing microorganisms and growth curves
Length
Overview
Learning Goals
Overview
Learn
The pathogenic effect of bacteria
Length
Overview
Learning Goals
Overview
Learn
Types of antibiotics and their action
Length
Overview
Learning Goals
Overview
Learn
Mechanisms of antibiotic resistance
Length
Overview
Learning Goals
Overview
Learn
Other pathogenic agents: fungi, viruses and protists
Length
Overview
Learning Goals
Overview
Learn
Problems of controlling endemic diseases
Length
Overview
Learning Goals
Overview
Learn
The immune system
Length
Overview
Learning Goals
Overview
Learn
Energy for biological processes
See All (6)
Respiration: definition and glycolysis
Length
Overview
Learning Goals
Overview
Learn
Aerobic respiration
Length
Overview
Learning Goals
Overview
Learn
Anaerobic respiration in mammals, plants and yeast
Length
Overview
Learning Goals
Overview
Learn
Photosynthetic pigments
Length
Overview
Learning Goals
Overview
Learn
Stages of photosynthesis and chloroplast structure
Length
Overview
Learning Goals
Overview
Learn
Factors affecting the rate of photosynthesis
Length
Overview
Learning Goals
Overview
Learn
Exchange and transport
See All (12)
Surface area to volume ratio and gas exchange
Length
Overview
Learning Goals
Overview
Learn
Cell membrane structure and permeability
Length
Overview
Learning Goals
Overview
Learn
Simple and facilitated diffusion
Length
Overview
Learning Goals
Overview
Learn
Osmosis and investigating water potential
Length
Overview
Learning Goals
Overview
Learn
Active transport and co-transport
Length
Overview
Learning Goals
Overview
Learn
Gas exchange in fish, insects, plants and humans
Length
Overview
Learning Goals
Overview
Learn
Mammalian circulatory system and blood vessels
Length
Overview
Learning Goals
Overview
Learn
Haemoglobin and the Bohr effect
Length
Overview
Learning Goals
Overview
Learn
Heart structure and the cardiac cycle
Length
Overview
Learning Goals
Overview
Learn
Heart rate regulation and electrocardiograms
Length
Overview
Learning Goals
Overview
Learn
Transport in plants - xylem
Length
Overview
Learning Goals
Overview
Learn
Transport in plants - phloem
Length
Overview
Learning Goals
Overview
Learn
Classification and biodiversity
Classification: phylogeny and taxonomy
Length
Overview
Learning Goals
Overview
Learn
Types of natural selection
Length
Overview
Learning Goals
Overview
Learn
Biodiversity: The index of diversity and agriculture
Length
Overview
Learning Goals
Overview
Learn
Cells, viruses and reproduction of living things
See All (7)
Eukaryotic cell structures
Length
Overview
Learning Goals
Overview
Learn
Prokaryotic cell structures and viruses
Length
Overview
Learning Goals
Overview
Learn
Viral life cycle, replication and control
Length
Overview
Learning Goals
Overview
Learn
The cell cycle and mitosis
Length
Overview
Learning Goals
Overview
Learn
Meiosis, genetic variation and mutations
Length
Overview
Learning Goals
Overview
Learn
Sexual reproduction in mammals
Length
Overview
Learning Goals
Overview
Learn
Sexual reproduction in plants
Length
Overview
Learning Goals
Overview
Learn
Biological molecules
See All (11)
Carbohydrates: types, structure and function
Length
Overview
Learning Goals
Overview
Learn
The structure and function of lipids
Length
Overview
Learning Goals
Overview
Learn
The structure and function of proteins
Length
Overview
Learning Goals
Overview
Learn
Nucleic acids: DNA and RNA
Length
Overview
Learning Goals
Overview
Learn
DNA replication
Length
Overview
Learning Goals
Overview
Learn
DNA, genes and chromosomes
Length
Overview
Learning Goals
Overview
Learn
RNA, protein synthesis and the genetic code
Length
Overview
Learning Goals
Overview
Learn
Enzymes: activation energy, properties and structure
Length
Overview
Learning Goals
Overview
Learn
Factors affecting enzyme activity
Length
Overview
Learning Goals
Overview
Learn
Inorganic ions: iron, hydrogen, sodium and phosphate
Length
Overview
Learning Goals
Overview
Learn
The properties and functions of water
Length
Overview
Learning Goals
Overview
Learn
Popular Chapters in All Year Groups
Global challenges
Key concepts
Inheritance, variation and evolution
Practical skills
Exchange and transport
Biology practicals
Biological molecules
Homeostasis and response
Substance exchange
Genetics
Biodiversity and variation
Cells
Working scientifically
Microbiology and pathogens
More
Beta
