When two people use the same dichotomous key to identify the same object is it possible for them to have different final answers?

Yes, the key factor is grade level experience

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