IB past paper analysis

Biology HL
November 2025 · Paper 1 · TZ1

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  • 40questions
  • 75marks
  • 60question parts
  • 47micro-topics

What this paper tests

Mark distribution

  • Continuity and change32%
  • Interaction and interdependence27%
  • Form and function24%
  • Unity and diversity17%

Hardest areas (by marks)

    Question types

    identify: 70%explain / justify: 17%write down / state: 5%show that / prove: 2%2%
    • identify70%
    • explain / justify17%
    • write down / state5%
    • show that / prove2%

    2% of parts are show / prove.

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    Questions in this paper

    Open a question to see what each part tests, how often that micro-topic comes up, and practise matched questions.

    Where to go next

    Good to know

    Can I download Biology HL November 2025 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 November 2025 TZ1 Paper 1?

    Continuity and change 32% (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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