Question

monomers are...

large molecules
one living thing
the single sub - units of macromolecules
another name for carbohydrates

Explanation:

Monomers are the single sub - units of macromolecules. Macromolecules like polysaccharides (carbohydrates), proteins, and nucleic acids are made up of repeating monomer units. For example, glucose is a monomer of starch (a carbohydrate).

Answer:

the single sub - units of macromolecules