What is the function of the part that is labeled A?

Monomers are the building blocks of larger molecules, called polymers. for example, proteins are composed of chains of amino acids that are linked together. cellulose is a polymer that makes up plant cell walls. cellulose is made from a chain of c6h10o5 molecules. which monomers are most likely used to produce cellulose? why?

This is one of the five kingdoms in the older biological succession. organisms in this kingdom are prokaryotic.

The sea slug that considered to be a photosyntheesizing animal