Across
- 3. exist within a population.
- 7. is a change in species over time There is overproduction of offspring, which leads to competition for resources.
- 8. similar structures, function in similar environments
- 9. similar early development
- 10. remains or traces of organisms from past
Down
- 1. a body part that has no use
- 2. similar DNA and amino acid sequences
- 4. similar anatomy from common ancestors
- 5. geographic distribution of a species
- 6. characteristics in related species can have underlying similarity even though functions may differ