Bio1151 Chapter 26 Phylogeny and The Tree of Life
  1.            is the study of the evolutionary history and relationships of organisms.

  2. Carolus Linnaeus introduced a system of           , for classifying species in seven hierarchical categories (taxa).

  3. Phylogenetic relationships are shown as branching trees where a branch point represents the divergence of two       when they shared a common           (homology).

    •                similarity can be misleading due to             evolution.

    •            homologies can reveal many relationships not attainable by other methods.

  4. Shared ancestry and shared          characters are drawn on a            to show evolutionary relationships; this practice is called             .

  5. A clade must be               , and consists of the           species and all its descendants.

  6. The tree of life is divided into three great clades called          :           (Monera),          , and          .