IB Biology HL A3.2.8 Hl Testing Classification Correspondence Questions

Cladistics tests whether traditional taxa match evolutionary relationships. The figwort family was reclassified using conserved chloroplast gene sequences, showing that some morphological similarities resulted from convergence.

Syllabus
First assessment 2025
Course
Biology HL
Level
HL

Exam points

  • Explain how cladistics tests whether traditional taxa match evolutionary relationships.
  • Describe the figwort family reclassification based on conserved chloroplast gene sequences.
  • Explain how some morphological similarities were shown to result from convergence.

IB Biology HL A3.2.8 Hl Testing Classification Correspondence Questions question 1

[Maximum number: 1]

The figwort family is a large one consisting of many flowering plants that look similar. For what reason have some members of the family been reclassified into a new family?

A

Cladistic analysis shows the differences in flower structure to be fewer than the shared similarities.

B

DNA analysis shows the similarities in flower shape to be a product of convergent evolution.

C

DNA analysis shows some of the families to have suffered recent mutations in only one gene.

D

DNA analysis shows the similarities between the seed dispersal strategies to be a product of divergent evolution.

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