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BIOLOGY 1407 BLINN EXAM 1 QUESTIONS AND ANSWERS /. The _______ of a phylogenetic tree represents the common ancestor, the _______ represent places where lineages diverge, and the _______ axis represents time. (Assume that the tree is oriented as depicted in the textbook.) - Answer-root; nodes; horizontal /.Consider four species of conifers. Species A and B are sister species. Species C and D are also sister species. The clade containing species A and B is a sister to the clade containing...