ConceptConceptDocsDocuments

IB Biology HL A3.2.7 Analysing cladograms Question Bank

Practise IB Biology HL A3.2.7 by interpreting roots, nodes and branching order to explain ancestry, relatedness and cladogram limits.

Syllabus
First assessment 2025
Course
Biology HL
Level
HL

Exam points

  • Distinguish the root, node and branch order when inferring common ancestors and relatedness.
  • Use cladograms to discuss classification, phylogeny, reclassification and limits such as convergence.

A3.2.7 (HL)—Analysing cladograms question 1

[Maximum number: 2]

The gut of a healthy human contains more than 1000 species of bacteria. Some of these species are shown in the cladogram.

Figure for Question A3.2.7 (HL)—Analysing cladograms question 1 — IB Biology HL

Identify, with a reason, whether the cladogram shows species X is more closely related to M. Iuminyensis or to E. faecalis.

All question bank results loaded