Across
- 1. the number of hearts in an octopus
- 4. any change in a gene
- 5. process by which species change over time
- 7. group of organisms that look alike and can reproduce among themselves
- 10. (2 words) body parts that seem to have no function
- 12. remains or traces of a once living organism
Down
- 2. (2 words) body parts that have the same basic structure
- 3. (2 words)survival of offspring that have favorable traits
- 6. trait that helps an organism survive in its environment
- 8. hardened tree sap
- 9. differences in traits among individuals of a species
- 11. no longer found as a living species