Chordates belong to the pylum Chordata of the Animal Kingdom.They have the following characteristics; Lower vertebrates have a notochord which is a hollow nerve chord that is located dorsally of the animal while higher vertebrates have a vertebral column of bone and cartilage. They have a coelom which is a body cavity that differentiates higher vertebrates into organs and digestive tract.
a drupe has usually only one seed but berries are characterized as having flesh endocarp and might have more than one seed hope this helps (if this is what u meant) also a drupe is a accessory fruit while a berry is a multiple fruit.
