What is the monomer of the macromolecule

What type of lipids are found in all biological membranes?

Prior to the development of dna fingerprinting, blood type could be used to determine possible parentage. although it might prove someone was not a parent, it could not show if someone was positively the parent, only that he or she might be a parent. which of the following is a true statement that can be made about parentage based on blood typing?

Why do oceanic plates tend to subduction when colliding with a continental plate