Across
- 3. nitrogenase and photosynthesis separated in time
- 7. gas exchange surfaces in lungs
- 8. readily available atoms necessary for life
- 9. lowering pH makes hemoglobin release more oxygen
- 11. enzyme to convert carbon dioxide into bicarbonate and H+ ions
- 12. photorespiration occurs on this enzyme if oxygen binds
- 13. enzyme that fixes nitrogen gas
- 14. diatomic oxygen is highly reactive
- 15. animals with highly efficient lungs, no mixing or dead space
Down
- 1. helps protect cells from reactive oxygen species
- 2. carbon concentrating mechanism of cyanobacteria
- 4. oxygen storage protein with heme
- 5. nitrogenase and photosynthesis separated in space
- 6. oxygen transport protein with heme
- 10. allowed for evolution of aerobic respiration