Question

Which one of the following is not a characteristic of phylum Annelida?

• A. Pseudocoelom
• B. Ventral nerve cord
• C. Closed circulatory system
• D. Segmentation

Answer 1

The correct option is A Pseudocoelom

• Annelids are the protostomes having a series of rings or segments that make up their whole body known as metameric segmentation.
• A ventral nerve cord and a simple brain comprising a pair of ganglia make the nervous system.
• The coelom is a fluid-filled space present between the body wall and digestive tube. Annelids have true coelom.
• The flow of blood through the complete system of blood vessels constitutes the closed circulatory system. Annelids have a closed circulatory system.

Thus, the correct answer is option A.