Refer to the figure. In the clade that contains species A, B, C, and D, species _______ would be part of the ingroup, and species _______ would be an outgroup.
A) A; B
B) A; E
C) E; A
D) E; D
E) E; F

Question

Refer to the figure.  In the clade that contains species A, B, C, and D, species _______ would be part of the ingroup, and species _______ would be an outgroup.
A) A; B 
B) A; E 
C) E; A 
D) E; D 
E) E; F

Quizplus · Accepted Answer

In the clade that contains species A, B, C, and D, species A, B, C, and D are part of the ingroup as they all share a common ancestor. Species E would be the outgroup as it is the most distantly related species and is used as a point of reference for determining evolutionary relationships within the ingroup. Species F is not included in this clade and therefore cannot be part of the ingroup or outgroup.

Refer to the Figure