Across
- 3. Father of evolution
- 4. The type of bird Darwin studied
- 7. Animals evolve through a process called natural ______
- 8. The scientific theory that all living things change over time
Down
- 1. The ancient land animals that whales are related to
- 2. Individuals of the same species can have natural _______
- 5. A specific characteristic of an organism
- 6. The islands Charles Darwin visited