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Variety of living organisms
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The classification shortcut

The classification shortcut

Flowchart showing how to classify an unknown organism or particle into virus, bacterium, plant, animal, fungus or protoctist using cells, nucleus and key features

Biologists classify organisms by looking for shared features. The quickest first questions are whether the specimen has cells and whether those cells contain a nucleus.

Variety of living organisms Lesson

  1. IGCSE
  2. /Biology
  3. /Variety of living organisms

Step-by-step lessons covering Edexcel IGCSE Biology Variety of living organisms for IGCSE Biology. Each lesson works through exam-style questions in Paper 1 and Paper 2 format. 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.