IB past paper analysis

Biology HL
May 2026 · Paper 1 · TZ3

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  • 40questions
  • 75marks
  • 59question parts
  • 48micro-topics

What this paper tests

Mark distribution

  • Continuity and change29%
  • Interaction and interdependence27%
  • Form and function24%
  • Unity and diversity20%

Hardest areas (by marks)

    Question types

    identify: 70%explain / justify: 14%outline: 9%distinguish: 3%2%
    • identify70%
    • explain / justify14%
    • outline9%
    • distinguish3%

    2% 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 HL 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?

    Continuity and change 29% (typical 28%), Interaction and interdependence 27% (typical 26%), Form and function 24% (typical 23%).

    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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