Missing Choices: a) many carnivorous vertebrates house large populations of symbiotic bacteria and protists in special fermentation chambers in their stomachs b) the intestines of carnivores tend to be longer than the intestines of herbivores of similar overall body size c) animals typically produce enzymes that hydrolyze cellulose d) the teeth of herbivores tend to be sharper than the teeth of carnivores e) cellulose digestion in ruminant mammals occurs before the ingested foods reach the small intestine Different types of food are eaten by various groups of animals, but it is usually true that E) cellulose digestion in ruminant mammals occurs before the ingested foods reach the small intestine.