Question

Which one of the following is not a member of phylum ‘Chordata’?

• A. Crocodile
• B. Columba
• C. Macropus
• D. Pleurobrachia

Answer 1

The correct option is D

Pleurobrachia

The correct option is D.

Explanation of the correct option :

1. The nerve cord is a single hollow, fluid-filled dorsal tube of neural tissue that distinguishes the phylum Chordata.
2. Later, this dorsal nerve cord develops into the spinal cord and brain of vertebrates.
3. They have pharyngeal gill slits and a post-anal tail.
4. They possess a ventral heart.
5. Example: Fish, amphibians, reptiles, cyclostomes, mammals, etc.

Final answer: Pleurobrachia is not a member of phylum ‘Chordata’.