What is true of the phylogeny in Figure 26.5?
1)It is rooted.
2)The gibbons and siamangs represent an outgroup of the great apes.
3)Chimps and humans are the closest extant sister taxa depicted here.
4)It is absolute, meaning free of error.
5)The last common ancestor of the great apes lived about 14 million years ago.
A) 1, 2, and 3
B) 1, 2, and 5
C) 1, 2, 3, and 4
D) 1, 2, 3, and 5
E) 2, 3, 4, and 5

Question

Quizplus · Accepted Answer

1) It is rooted, as indicated by the presence of an outgroup (represented by the orangutan).
2) The gibbons and siamangs represent an outgroup of the great apes, as they are the most distantly related to the other taxa in the tree.
3) Chimps and humans are the closest extant sister taxa depicted here, as indicated by the short branch length between the two.
5) The last common ancestor of the great apes lived about 14 million years ago, as indicated by the approximate branch lengths and divergence times inferred from molecular data. 
4) It cannot be determined from the given information whether the phylogeny is absolute or free of error.

What Is True of the Phylogeny in Figure 26