Across
- 6. the young of a living organism
- 8. the death of all living members of a species
Down
- 1. the differences between organisms of the same species
- 2. the process by which characteristics are passed down to offspring from their parent(s)
- 3. a feature or trait of an organism
- 4. A scientist who developed the theory of evolution by natural selection
- 5. a living thing from which another living thing is descended
- 7. the preserved remains or impression of a prehistoric living thing embedded in rock