Three living species X, Y, and Z share a common ancestor T, as do extinct species U and V. A grouping that consists of species T, X, Y, and Z (but not U or V) makes up ________.
A) a monophyletic taxon
B) an ingroup, with species U as the outgroup
C) a paraphyletic group
D) a polyphyletic group

Question

Quizplus · Accepted Answer

A paraphyletic group includes an ancestor and some, but not all, of its descendants. Here, species T, X, Y, and Z are included, but not U and V, making it paraphyletic.

Three Living Species X, Y, and Z Share a Common