Natural selection
Across
- 3. a related organism from a previous generation
- 6. living things
- 7. any difference in traits between individual organisms
- 8. a characteristic that all members of a species have
- 9. a specific characteristic of and individual organism
- 10. an animal that is hunted or killed by another animal for food
Down
- 1. to receive genes from a parent
- 2. an instruction for making a protein molecule
- 4. to stay alive
- 5. a way of hiding by looking the same as the background