IB past paper analysis

Biology SL
May 2026 · Paper 1 · TZ3

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  • 30questions
  • 55marks
  • 44question parts
  • 36micro-topics

What this paper tests

Mark distribution

  • Form and function29%
  • Interaction and interdependence27%
  • Continuity and change26%
  • Unity and diversity18%

Hardest areas (by marks)

    Question types

    identify: 73%explain / justify: 9%outline: 7%distinguish: 5%5%
    • identify73%
    • explain / justify9%
    • outline7%
    • distinguish5%

    5% of parts are show / prove.

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    Questions in this paper

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    Where to go next

    Good to know

    Can I download Biology SL May 2026 TZ3 Paper 1 here?

    No. The paper and its mark scheme belong to the IB and are not reproduced. This page gives the structure of every question (marks, command term, micro-topic, the skill tested), the exam analysis, and practice questions we wrote to test the same skills. Subscribers can also open our summary of how each part's marks are awarded.

    Which topics dominate May 2026 TZ3 Paper 1?

    Form and function 29% (typical 24%), Interaction and interdependence 27% (typical 23%), Continuity and change 26% (typical 25%).

    How do I practise this paper without the paper?

    Press "Practise similar" on any question. We open questions matched by micro-topic, command term and mark range with model answers and AI marking, then bring you back here.

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