chordate

all chordates share a common ancestor.

fish are a type of chordate.

chordates can be classified into several groups.

the study of chordates is essential in biology.

birds and mammals are both chordates.

understanding chordate evolution helps scientists.

chordates exhibit a variety of body plans.

many chordates have complex nervous systems.

amphibians are also classified as chordates.

chordate characteristics include a notochord and dorsal nerve cord.