Four Different Phylogenetic Trees of a Group of Salamanders Have

question 200

Multiple Choice

Four different phylogenetic trees of a group of salamanders have been proposed.Trees A and B each require 19 homoplasies, but tree A requires 16 synapomorphies, and tree B requires 15 synapomorphies.Tree C requires 15 homoplasies and 18 synapomorphies.Finally, tree D requires 22 homoplasies and 9 synapomorphies.According to the principle of parsimony, which tree or trees is/are the best?

• A) Tree A
• B) Tree B
• C) Tree C
• D) Tree D
• E) Both tree A and tree B are equally good, and better than the others.

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