By examining the phylogenetic tree diagrammed in the accompanying figure, what conclusion can you draw about the species G. microti?
A) It evolved before G. intestinalis.
B) It is more closely related to G. muris than to G. intestinalis.
C) It should not be labeled a species distinct from G. intestinalis.
D) It is part of a monophyletic group that also includes G. intestinalis.

Question

Quizplus · Accepted Answer

The phylogenetic tree shows that G. microti is included in a monophyletic clade with G. intestinalis, meaning that they share a common ancestor and evolved from a single lineage. This suggests that G. microti is a distinct species from G. intestinalis but is closely related to it.

By Examining the Phylogenetic Tree Diagrammed in the Accompanying Figure