Identifying Similarities Among Organisms

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Across
  1. 4. ancient species from which two or more species evolved
  2. 5. organism with one line of symmetry drawn down the middle to create two identical halves has __________ symmetry
  3. 8. organism with many lines of symmetry has ____________ symmetry
  4. 9. earliest stage of an organism's development
Down
  1. 1. study of the development of unborn organisms
  2. 2. organism with no lines of symmetry is ____________
  3. 3. process of biological change over generations
  4. 6. body structure and structural traits
  5. 7. closest living relative to a whale