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A prerequisite knowledge graph of 1590 learning concepts across 8subjects. Track what you've mastered and see exactly what you're ready to learn next — the topics whose prerequisites you've already met. Built on the Marble Open Skill Taxonomy.

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Variation in Species

Science · Ecosystems & Habitats · conceptual

Explain variation within and between species, distinguishing between continuous variation (e.g. height) and discontinuous variation (e.g. blood group), and between genetic and environmental causes

What mastery looks like

  • Gives examples of continuous and discontinuous variation in humans
  • Distinguishes between genetic causes of variation (inherited differences) and environmental causes (diet, sunlight, etc.)
  • Explains why sexual reproduction produces greater variation than asexual reproduction
  • Draws or interprets a frequency graph showing continuous variation

Check your understanding

If Variation in Species looked around a classroom and noticed that everyone has slightly different heights, hair colours, and eye colours, could they explain why these differences exist — and which ones are inherited, which are down to the environment, and which are both?

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