Question

all vertebrates are chordates but all chordates are not vertebrates

Answer 1

all vertebrates are chordates because thhey possess three basic chordates features as:
All chordates possess a notochord.
All chordates have a dorsal, hollow nerve
All chordates have pharyngeal gill clefts in some stage of their life cycle. All chordates are not vertebrates: Vertebrates have vertebral column but protochordates and agnatha have notochord that is not replaced by vertebral column. some stage of their life cycle. All chordates are not vertebrates: Vertebrates have vertebral column but protochordates and agnatha have notochord that is not replaced by vertebral column.

Answer 2

All vertebrates are chordates but all chordates are not vertebrates justify the statement

Answer => the members of subphylum vertrebratba posses notochord during the embryonic period thus hence the. Notochord is being replaced by a bony vertebral column in adults