Across
- 1. organisms that can reproduce among themselves
- 4. similar in origin and structure
- 7. change in features of species over time
- 10. comparative ______ compares DNA and proteins
Down
- 2. comparative ______ compares structures of cells
- 3. explanation for presence of mitochondria
- 5. serve similar purpose but evolved independently
- 6. comparative ____ compares bone structure
- 8. comparative ____ compares embryos of organisms
- 9. system of ideas intended to explain something