Across
- 5. Survival of the fittest
- 8. a genetic variation that is helpful to the species
- 9. same species, different traits
- 11. the remains of body parts
Down
- 1. Evidence of the activities of organism
- 2. gradual slow process
- 3. a rock that contains preserved parts
- 4. error in DNA
- 6. structure organisms have similar bone or organ structures
- 7. Proposed the theory of Natural selction
- 10. Collection of fossils that show the timeline of life on earth