Across
- 1. change over time
- 3. someone who studies fossils
- 8. mouth develops first
- 10. father of evolution
- 11. rate of mutation
- 12. animal dies out
- 13. mulicellular
- 14. fertilized egg
Down
- 1. study formation
- 2. reproduction success
- 4. guess or idea
- 5. diagram
- 6. populations evolve
- 7. adapting
- 9. early embryo