Cellulose is the structural component of cell walls. Cellulose is a polysaccharide. Which would be a monomer of cellulose? Monosaccharides
Amino acids
Fatty acids
Nucleotides

clinically, some people often have repeated allergies, eczema and respiratory infections or other parts of the infection, in this case, in addition to some routine tests such as tests for white blood cells, immunoglobulin series, lymphocyte subsets, etc., the five immune immunoglobulin tests are also necessary.

1. is geographic distribution

2 is increasing complexity

3 is transitional forms