Across
- 6. "survival of the fittest"
- 9. similar structure in different species of same lineage
- 10. heritable characteristics that increase an organism's fitness
Down
- 1. ability to survive and reproduce
- 2. selective breeding of organisms for specific traits
- 3. structure that has lost its function
- 4. similar structure/function from different lineage
- 5. study of distribution of organisms in their environment
- 7. genetic change in populations over time
- 8. preserved remains of ancient organisms