If the tree in the figure is rooted at point A Unrooted tree 1 2 B O 1, 2, and 3 form a monophyletic group. O 2, 3, 4, and 5 form a monophyletic group. O 3, 4, and 5 form a monophyletic group. O 3 and 4 form a monophyletic group. A 4 3 5

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