IB Biology HL A Unity and Diversity Questions

Practise IB Biology HL A Unity and Diversity through questions on water, nucleic acids, cells, viruses, biodiversity, classification and evolution, including the wider HL evidence set.

616 questions in this syllabus scope, with question parts counted together.

Syllabus
First assessment 2025
Course
Biology HL
Level
HL

Exam analysis

HL · 2010–2025
Past-paper evidence in Unity and Diversity repeatedly links cell structures, nucleic acids, organism diversity and evolution. The strongest pattern is not isolated recall, but explaining how molecular and cellular evidence supports biological unity, variation and classification.
Papers with this topic110 / 117in the analysed sample
Latest appearanceNovember 2025
Tagged question parts340
Paper types5

Most tested topics

  1. A2.2 Cell structure58 papers
  2. A1.2 Nucleic acids41 papers
  3. A4.1 Evolution and speciation38 papers
  4. A3.1 Diversity of organisms35 papers
  5. A3.2 Classification and cladistics [HL only]31 papers

117 papers analysed · Tagging incomplete