Across
- 2. a arrangement of species
- 4. a theory of cell evolution
- 8. a key mechanism in evolution
- 10. / second highest taxonomy rank
- 11. a formation of new species
- 12. a individual form of life
Down
- 1. / a variety of life in the world
- 3. a system of classification
- 5. diagram used for classification
- 6. came up with the theory of
- 7. a medicine
- 9. change in characteristics over time