Answer:
i'd recommend rereading it
Explanation:
No I have not completed it but, I'd be happy to help you with any other questions you might have.
Answer:
Invertebrates include all animals that lack a backbone, or a vertebral column. All chordites exhibit four characteristics during at least one stage of life: a dorsal, hollow nerve chord; a notochord; a tail that extends beyond the anus; and pharyngeal pouches.
