-According to the phylogenetic tree in the accompanying figure, G. intestinalis constitutes a ________ group.
A) paraphyletic
B) monophyletic
C) polyphyletic

Question

-According to the phylogenetic tree in the accompanying figure, G. intestinalis constitutes a ________ group.
A) paraphyletic 
B) monophyletic 
C) polyphyletic

Quizplus · Accepted Answer

G. intestinalis is a paraphyletic group because it includes the common ancestor of G. intestinalis and G. lamblia, but not all of the descendants of that ancestor (G. lamblia is not included in the group).

-According to the Phylogenetic Tree in the Accompanying Figure, G