Across
- 1. Individuals do this to fit their environment
- 3. Made up of DNA
- 6. A distinguishing feature or characteristic
- 9. Difference among individuals
- 10. Describes an individual's ability to survive and reproduce
Down
- 2. A famous naturalist
- 4. To gradually develop and advance
- 5. A set of volcanic islands
- 7. Has four legs and a hard shell
- 8. A small type of bird