Question

Vertebral column is derived from
A. Dorsal nerve cord
B. Ventral nerve cord
C. Outgrowth of the cranium
D. Notochord

Answer 1

Hint: All chordates are characterized by three main chordates accentuates, the existence of a notochord, a dorsal hollow nerve cord as well as they have paired pharyngeal gill slits. The notochord, later on, provides an increase to a bony vertebral column, that surrounds and preserves the spinal cord.

Complete answer:A. The dorsal nerve cord is a different feature to chordates, and it is primarily set up in the Vertebrata subphylum of chordate. The dorsal nerve cord is only one embryonic characteristic unique to all chordates, among the other four chordate features- a notochord, a post-anal tail, an endostyle, along with pharyngeal slits.
B. The ventral nerve cord (VNC) is a main system of the invertebrate central nervous system. It is the functional counterpart of the vertebrate spinal cord. These neutralists generate the embryonic nervous system as well as 10% of the future adult neurons before attaining quiescence toward the end of embryonic stages.
C. Cranium in plural known as craniums or cranial In anatomy. The braincase or neurocranium is that part of the skull comprising the bones surrounding the brain, but not comprising the bones of the face or jaw.
D. In anatomy, the notochord is an adjustable rod formed of a material similar to cartilage. If a species has a notochord at any step of its life cycle, it is, by definition, a chordate. The notochord found along with the anteroposterior axis is normally nearer to the dorsal than the ventral surface of the animal, as well as is formulated of cells derived from the mesoderm.
So, the accurate answer to the given question is Option (D) “Notochord”.

Note: The vertebral column, also known as the spinal column, is the prominent axis of the skeleton in all vertebrates. The vertebral column provides attachments to muscles, supports the trunk, safeguards the spinal cord as well as it also nerves roots along serves as a site for hemopoietin.