Across
- 2. ____ worms, duck leeches, and bristol worms have purple blood
- 6. have yellow blood
- 7. a Yellow vanadium-based pigment
- 9. have blue blood
- 12. an iron-containing respiratory pigment of vertebrate red blood cells
- 13. some have blue blood
- 14. measurement of a particular substance
Down
- 1. have colorless blood
- 3. have red blood along with most invertebrates
- 4. have blue blood
- 5. cause purple and colorless blood
- 8. have green blood
- 10. number of a species that has colorless blood
- 11. The color of blood is traced to the ______ molecules that carry oxygen in the blood