Photosynthesis Explained: Equation, Process and Limiting Factors
Learn how plants make glucose and oxygen from light, water and carbon dioxide, with the equation, limiting factors and practice questions.
KS3GCSEMiddle SchoolHigh School+1🧬 Biology · 13 guides
Biology Revision Notes for GCSE and High School
Get clear on mitosis, enzymes, homeostasis and natural selection. These guides cover GCSE Biology topics and the same ideas you meet in high school and AP Biology, with worked examples and practice questions so you can check you have got it.
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Plant and Animal Cells: Parts, Functions and Magnification
Learn the parts of plant and animal cells, what each one does and how to calculate magnification, with worked examples and practice questions.
KS3GCSEMiddle SchoolHigh School+1Aerobic and Anaerobic Respiration: Equations and Differences
Compare aerobic and anaerobic respiration in animals and yeast, with the equations, oxygen debt and practice questions to test yourself.
GCSEHigh SchoolAPDNA, Genes and Inheritance: Punnett Squares Explained
Understand genes, alleles, dominant and recessive traits and how to complete a Punnett square, with worked examples for GCSE and high school.
GCSEA-LevelHigh SchoolAPEnzymes and Digestion: How They Work and What Affects Them
Learn how enzymes work, why temperature and pH matter and which enzymes digest starch, protein and fat, with worked examples.
GCSEHigh SchoolAPMitosis and the Cell Cycle: Stages Explained Step by Step
Learn what happens at each stage of mitosis, why cells divide and how to count cells after division, with worked examples and practice questions.
GCSEHigh SchoolAPMeiosis Explained: How Gametes Form and Why It Matters
See how meiosis makes four different gametes, how it differs from mitosis and why sexual reproduction creates variation, with practice questions.
GCSEHigh SchoolAPNatural Selection and Evolution: How It Works, With Examples
Understand variation, competition and inheritance, with examples such as peppered moths and antibiotic resistance, and practice questions.
GCSEHigh SchoolAPFood Chains and Food Webs: Producers, Consumers and Energy
Read food chains and food webs, name trophic levels and calculate how much energy passes between them, with worked examples.
KS3GCSEMiddle SchoolHigh SchoolThe Heart and Circulatory System: Structure and Function
Learn the chambers of the heart, how blood flows around the body and how to calculate cardiac output, with worked examples.
GCSEHigh SchoolThe Reflex Arc and Nervous System: Pathway and Examples
Follow the pathway from stimulus to response, and learn how reflexes differ from voluntary actions, with worked examples.
GCSEHigh SchoolHomeostasis: Blood Glucose, Temperature and Negative Feedback
Learn how the body keeps conditions steady, how insulin and glucagon control blood glucose and what happens in diabetes, with examples.
GCSEHigh SchoolAPDiffusion, Osmosis and Active Transport: Differences Explained
Compare how substances move into and out of cells, what affects the rate and how to calculate percentage change in a potato practical.
GCSEHigh SchoolAP