Allen's and bergmann's rules are perfect examples of natural selection which include the limb and trunk proportions of Neandertals.
According to Bergmann's rule, creatures at higher latitudes should be larger and thicker than those closer to the equator to better preserve heat, and according to Allen's rule, those at higher latitudes will have limbs that are shorter and thicker.
Latitudinal size clines can also be explained by seasonality and plant productivity. With endotherms, the rules typically apply, although in insects, various species within the same genus can react to latitude in unexpected ways.
Therefore, Allen's and bergmann's rules are perfect examples of natural selection which include the limb and trunk proportions of Neandertals.
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