Chapter 12 Vocabulary - Rondell Honor

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Across
  1. 2. geographic distribution of a species
  2. 5. characteristics in related species can have underlying similarity even though functions may differ
  3. 7. species found at a certain geographic location and nowhere else
  4. 9. forms a fossil that shows an intermediate state between an ancestral trait and that of its later descendants
  5. 10. organs structures w/little or no use (eg. flightless bird wings, appendix, whale thighs)
Down
  1. 1. study of fossils
  2. 3. structures similar anatomy from common ancestors (eg. forelimbs of human/cat/whale/bat)
  3. 4. homologies similar DNA and amino acid sequences
  4. 6. homologies similar early development (eg. vertebrate embryos with tail & pharyngeal pouches)
  5. 8. structures similar structures, function in similar environments