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  1. IGCSE
  5. Lessons

Biology Lessons

Spec 4BI1

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Step-by-step Edexcel IGCSE Biology lessons by topic, building up to exam-style questions. Start with the foundational cell biology and core content before moving on to the more data-heavy ecology, genetics and practical-skills topics, which carry a large share of the exam marks.

The nature and variety of living organisms

Characteristics of living organisms

Variety of living organisms

Structure and functions in living organisms

Level of organisation

Cell structure

Biological molecules

Movement of substances into and out of cells

Respiration

Gas exchange

Transport

Excretion

Co-ordination and response

Reproduction and inheritance

Reproduction

Inheritance

Ecology and the environment

Cycles within ecosystems

Use of biological resources

Food production

Selective breeding

Genetic modification (genetic engineering)

Cloning