Pearson Edexcel International GCSE Biology · specification 4BI1 · Paper 1 | Whole paper: Core content, all five topics · Free · no account needed
2(a) Level of organisation (4BI1 specification)
From organelle to organism: the hierarchy every later topic depends on.
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The Incandio page that teaches this — each explained in full, then proved in marked questions, taught back to an AI pupil and defended in a debate. Completely free.
- Levels of Organisation — From organelle to organism — the five-step ladder that every later topic in biology is built on.
The teaching route this belongs to: Topic 2 · Structures and functions in living organisms (Biology) — the lessons in order, with every gate.
Specification coverage
Topic 2 Structures and functions in living organisms (a) Level of organisation — statements 2.1
Assessment objectives: AO1, AO2. Suggested learning time: 20 minutes.
Required knowledge
- The levels of organisation: organelles, cells, tissues, organs and systems
Required skills
- Place any named structure at the correct level
- Use the hierarchy to explain how a function is achieved
How it is examined
- Multiple-choice and short-answer recall
- Application of the content to an unfamiliar context
- Extended open-response, marked on the quality of a connected explanation
Common mistakes
- Calling a tissue an organ. A tissue is one type of cell working together; an organ combines tissues.
This page maps the specification. The pages above teach it, and the Biology lessons hold the whole course — completely free.