Which example best represents the ability of carbohydrates to serve as structural components?
a. the muscles of animals are held together by connective tissue.
b. the rigid cell wall of green plants is composed of cellulose.
c. the bones of animals store minerals such as calcium phosphate.
d. the roots of many plants store glycogen produced by the plant.

B, The rigid cell wall of green plants is composed of cellulose.

Explanation:

Cellulose is an organic compound, classified as a carbohydrate, that makes up a tough cell wall surrounding plant cells. It is a polysaccharide with beta 1, 4 d-glucose linkages (very strong bonds) making it very difficult to degrade by hydrolysis and enzymatic action. Through that, cellulose serves an important structural component because it provides roots and stems their rigidity, toughness and protection from microbial degradation.

explanation:

b,bacteria convert nitrates

into nitrogen gas.

d,plants and animals take in

and use nitrogen compounds.

e,bacteria break down waste    

products and return nitrogen  

to the soil.

a,bacteria convert atmospheric

nitrogen to ammonia.

c,bacteria convert ammonia

to nitrites and nitrates.

answer: national resource conservation services

national resource conservation services is the us. based approach that provides technical and financial assistance for natural resource management. nrcs society in conservation of resources by involving in activities like farmland protection, flood prevention, watershed protection, urban conservation, conserves economic and environmental conditions. it conducts soil surveys and implements the policy of natural resources management on the society.