Pronghorn antelopes are able to run at high altitudes where oxygen is scant relative to low altitudes for long periods of time. This ability is attributed to the superabundance of mitochondria in their limb muscles. This explanation could be considered

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The explanation is mechanistic because it describes how the presence of a large number of mitochondria in the limb muscles of pronghorn antelopes enables them to run at high altitudes by efficiently using the available oxygen. This focuses on the biological mechanism that allows for this capability.

Pronghorn Antelopes Are Able to Run at High Altitudes Where