The graph compares the oxygen dissociation curves for haemoglobin in animals living at high altitude and in animals living at low altitude. What accounts for the oxygen dissociation curve at high altitude?
- AHaemoglobin has a higher affinity for oxygen.
- BHaemoglobin releases oxygen more readily.
- CThe change in partial pressure of carbon dioxide causes a Bohr effect.
- DThe decrease in percentage of carbon dioxide causes the curve to shift to the left.