Across
- 3. organism with one line of symmetry drawn down the middle to create two identical halves has __________ symmetry
- 4. ancient species from which two or more species evolved
- 7. organism with many lines of symmetry has ____________ symmetry
- 8. body structure and structural traits
- 9. closest living relative to a whale
Down
- 1. process of biological change over generations
- 2. earliest stage of an organism's development
- 5. organism with no lines of symmetry is ____________
- 6. study of the development of unborn organisms