Question

Chordates have

• A. Dorsal nerve cord
• B. Dorsal hollow nerve cord
• C. Brain
• D. Ventral nerve cord

Answer 1

Answer: (B)

Dorsal hollow nerve cord

The notochord runs beneath the dorsal nerve cord, which is another chordate feature. This is in contrast to organisms such as annelids and arthropods, in which the main nerve cord is ventral. The chordate nerve cord is hollow, with pairs of nerves branching from it at intervals and running to the muscles. The anterior (forward) end of the nerve cord is often enlarged into a brain.

So, the correct answer is option B.