Across
- 4. differentiations in genetics
- 6. _____ "as such" - the theory that the world and the organisms in it are constantly changing
- 7. all of life can be traced back to the same few ancestors
- 11. "creating" a new organism by combining two from distinct populations
- 12. extinction on a large scale
Down
- 1. organisms fight each other to survive
- 2. organisms pick up survival instincts over time
- 3. evolution occurs little by little over a lengthy span of time
- 5. more organisms are produced than can live
- 8. author of "On the Origin of Species"
- 9. survival of the fittest
- 10. main organism that gave Darwin insight on evolution