Vertebrates is the answer
Skin cream,lotion,some gels that is all that i know of
B: Cells are the basic operating units of living organisms.
Carrot i would say is the answer.
An annulus is the ring-like structure found on the stipe of some species or mushrooms. This represents the remaining part of the partial veil, after it has been ruptured to expose the gills or other pore producing surface. As its function is to disperse the spores.