Across
- 5. natural______
- 7. the change in the characteristics of a species over several generations
- 8. charles____
Down
- 1. _____darwin
- 2. a theory of biological evolution made by charles darwin
- 3. remains of animals
- 4. the branch of biology that deals with phylogenesis.
- 6. existing in or caused by nature; not made or caused by humankind.