Cellulose is .
a.
a component of plasma membranes
b.
a polymer of glucose and fructose
c.
a material found in plant cell walls

d.
the most complex of the organic compounds
e.
a polymer of glucose and galactose

C. A material found in plant cell walls.

Explanation:

Cellulose is an insoluble substance which is the main constituent of plant cell walls and of vegetable fibers such as cotton. It is a polysaccharide consisting of chains of glucose monomers. It is the cell wall of the plants and it provides protection for many  things inside the functioning's of a plant.

straight fertilizers

the major parts of the digestive system:

salivary glands.

pharynx.

esophagus.

stomach.

small intestine.

large intestine.

rectum.

accessory digestive organs: liver, gallbladder, pancreas.