How many different unrooted tree arrangements are possible for a phylogenetic tree relating four species?
A)Three
B)Four
C)Two
D)Seven

Question

Quizplus · Accepted Answer

There are three possible unrooted tree arrangements for a phylogenetic tree relating four species. These are:1) A linear arrangement, with one species at each end and the other two species in the middle.2) A star-shaped arrangement, with one species at the center and the other three species connected to it.3) A triangular arrangement, with three species at the corners of a triangle and the fourth species connected to two of the corners.

How Many Different Unrooted Tree Arrangements Are Possible for a Phylogenetic