Across
- 3. unit that determines a particular characteristic in an organism
- 5. the process of two or more parties striving to gain something
- 9. the ability to alter the structure or function of an organism to better suit its environment
- 10. a difference in individual species
Down
- 1. proposed the theory of evolution by natural selection
- 2. the preserved remains or impression of a plant or animal
- 4. to gradually develop
- 6. a group of organisms that belong to the same species or are living in the same area
- 7. to continue to live or exist
- 8. a set of statements or ideas intended to explain a topic or phenomena