Most herbivorous animals do not have the ability to digest the cellulose in plants. what mechanism has evolved in the absence of this ability that allows them to survive despite eating only plant matter?

Grass and leaves contains cellulose. Herbivores that feed on them lacks the enzymes required to break down cellulose.

However they possess multi chambered stomachs and they have a symbiotic relationship with micro organisms that live within the stomach.they micro organisms ,such as bacteria,helps to break down the cellulose into the form that the animal can absorb

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