Agroup of cells working together make up a(n) organ system
molecule
organ
tissue

Cells that are working together is called a system

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

The answer will be d