IB past paper analysis

Biology SL
May 2026 · Paper 1 · TZ1

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  • 30questions
  • 55marks
  • 46question parts
  • 39micro-topics

What this paper tests

Mark distribution

  • Interaction and interdependence31%
  • Form and function27%
  • Continuity and change26%
  • Unity and diversity16%

Hardest areas (by marks)

    Question types

    identify: 74%explain / justify: 9%write down / state: 4%compare: 4%0%
    • identify74%
    • explain / justify9%
    • write down / state4%
    • compare4%

    0% 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 TZ1 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 TZ1 Paper 1?

    Interaction and interdependence 31% (typical 23%), Form and function 27% (typical 24%), 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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