Which of the following morphological characteristic is unique to Phylum Chordata?

Correct option is C

Correct Answer: (c) Notochord
Explanation:
→ The notochord is the defining and unique morphological feature of all chordates, present at least in the embryonic stage.
→ It provides structural support and serves as a precursor to the vertebral column in vertebrates.
Information Booster:
→ Other chordate features include dorsal hollow nerve cord, post-anal tail, and pharyngeal slits.
→ Retained in adult stages of some fishes like lampreys.
Additional Information:
(a) Ventral nerve cord is found in arthropods and annelids—not chordates.