Similarities found between current and ancestral primates demonstrates that arboreal theory was the most convincing because current Indriids and their digestion of available food in arboreal habitats demonstrate how adaptations were directed towards better living in arboreal living. Because of arboreal living Indriids had to adapt to consuming large amounts of vegetation from trees when traveling. This abundant amount of leaves is uneasy to digest Indriids adapted to this by having chambered stomachs allowing cellulose to be broken down and digested for absorption of nutrients. These examples demonstrate that arboreal theory is the best hypothesis because primate living was surrounded around to the availability of arboreal resources and primate anatomy evolved aiding in digestion of only arboreal resources.
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