Cows and other ruminants are herbivorous animals. Their diet includes cellulose, which must be fermented before it can be digested. Which of these aid in the fermentation of cellulose in a cow?s digestive system?
Select one:
a. Algae
b. Bacteria
c. Fungi
d. Viruses

B)  Bacteria

Explanation:

b) bacteria

cows feed on herbs our cells are covered by cellulose, carbohydrate that cannot be digested by the mammalian vesto. When the animal swallows the food, it first passes it almost without chewing to the belly, which is a fermentation cavity that contains protozoa and bacteria to ferment the grass.

answer : haversian

[explanation: -(compact bone is organized as parallel columns, known as haversian systems, which run lengthwise down the axis of long bones. these columns are composed of lamellae, concentric rings of bone, surrounding a central channel, or haversian canal, that contains the nerves, blood vessels, and lymphatic system of the bone)]

the answer would be   10%