Monophyletic groups are: A. composed of organisms that look alike
B. composed of all members of a group and their ancestral forms
C. creatures who live in similar environments
D. a theoretical concept impossible to recognize in nature.

im terrible at biology, im thinking the 2nd one (B), but i could be totally wrong.

Question

Monophyletic groups are: A. composed of organisms that look alike
      B.  composed of all members of a group and their ancestral forms
      C. creatures who live in similar environments
      D. a theoretical concept impossible to recognize in nature. 

im terrible at biology, im thinking the 2nd one (B), but i could be totally wrong.

anonymous · Answer

It is B. 
A monophyletic group is composed of consisting of a species and all its descendants.