25. Phylogeny
Phylogeny
Multiple Choice
Multiple ChoiceBirds and mammals have a four-chambered heart, but most reptiles have a three-chambered heart. How does this fact affect the construction of phylogenetic trees for these groups?
A
It shows that the common ancestor of birds and mammals must have had a four-chambered heart.
B
This represents a problem with the principle of parsimony rather than a problem with the analogy-homology issue.
C
The most likely tree is always the most parsimonious.
D
None of the listed responses is correct.
E
The most likely tree is not always the most parsimonious.
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