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Unformatted text preview: leading to the contemporary forms of A and B Repeat this for C and F 2. Find organisms that have more than one difference B differs from C by TWO features , so the last common ancestor of this pair lived before the common ancestor of A and B and C and F Organisms D and E also differ by just two features o They may be closely related to each other, however, not to the other organisms o Therefore, D and E are paired up by linking them with a common ancestor 3. See which organisms differ by three or four characteristics To confirm the earlier assumption of the relationship between A, B, C and F 4. Next, look for organisms that differ by FIVE features These are beetles A and D, C and E, and E and F When these groups are linked by a common ancestor, the tree is complete...
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- Fall '07