the reproductive incompatability, is based on physiological range.
in general, there are multi organizational levels of reproductive incompatability.
in this case, the geographic distance, orogenic blockade, and ecological confounds of arctic conditions preclude easy mingling of U.arctos x U. maritimus.
in general, there are multi organizational levels of reproductive incompatability.
in this case, the geographic distance, orogenic blockade, and ecological confounds of arctic conditions preclude easy mingling of U.arctos x U. maritimus.