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Q36 - Four Ways to Draw the Same Phylogeny

Theoretical B Real exam question - full text reproduced under IBO's CC BY-NC-SA 4.0 license
Phylogenetic Trees & Cladistics

The phylogeny of seven species is presented in four different ways (Fig.).

Four phylogenies of seven species (1-7).

Figure 1. Figure 1.

Using the information and data, determine which of the statements are true or which are false.

A. All four trees reflect the same phylogeny
B. In all phylogenies, species 6 is expected to have more mutations than species 2
C. In phylogeny A, species 1, 6, and 7 constitute a monophyletic group
D. In phylogeny C, species 7 is more closely related to species 3 than to 5
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Question reproduced from IBO 2015, Theoretical Exam B, licensed under CC BY-NC-SA 4.0 - attributed to the International Biology Olympiad. Open the full exam PDF · Community solutions (unofficial)