Some simpler animals lack what type of embryonic tissue?

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

Compound light microscope

Bees shall never produce milk no matter what but this is a joke and the answer is a breast that produces milk.