Which characteristic do glycogen and starch share?
a. both are difficult to digest.
b. both are storage forms of glucose.
c. they are the most energy-rich organic molecules.
d. both are proteins.

There are a few characteristics that both glycogen and starch share. Some things they share are; both are storage forms of glucose, both have a grainy texture, and they are both branched. 

This is what i found on google“ the monomers combine with each other via covalent bonds to form larger molecules known as polymers. in doing so, monomers release water molecules as byproducts. this type of reaction is known as dehydration synthesis, which means “to put together while losing water. in the process, a water molecule is formed.” i hope this you

Ithink all of these events