What physiological adaptation in the blood of the vicuña facilitates its survival in the low-oxygen environment of the puna grasslands?
Answer
High concentration of red blood cells
Vicuñas are biologically engineered to thrive in environments where other mammals would struggle due to hypoxia, or low oxygen availability. A primary adaptation for this is an exceptionally high concentration of red blood cells, which significantly boosts the blood's capacity to transport oxygen. Furthermore, the specific structure of their hemoglobin allows for more efficient oxygen binding and release at the low atmospheric pressures found at high altitudes, enabling them to survive and move efficiently across the altiplano.

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