Across
- 3. differences in organisms in a population
- 7. more offspring than can survive
- 9. remains of dead animals
- 10. how animals have changed
- 13. where Darwin made many of his discoveries
Down
- 1. some individuals survive longer and reproduce more than others do
- 2. the bodily structures of different organisms
- 4. traits that help individuals survive
- 5. a character that is shared by a group of species because it is inherited from a common ancestor
- 6. the birds that Darwin studied
- 8. geologist that theorized the deeper you dig the older fossils get
- 11. thought of the false theory of inheritance of acquired traits
- 12. economist who realized that the human population grows exponentially