Question 45

(Multiple Choice)

Cattle are able to survive on a diet consisting almost entirely of plant material because


A)they are autotrophic.
B)cattle, like rabbits, re-ingest their feces.
C)they manufacture all 15 amino acids out of sugars in the liver.
D)cattle saliva has enzymes capable of digesting cellulose.
E)they have cellulose-digesting, symbiotic microorganisms in chambers of their stomachs.

Answer