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