Question

Which of the following characters is not applicable to Echinodermata?

• A. Water-driven tube system
• B. Pseudocoelom
• C. Spiny-skinned
• D. Radial symmetry

Answer 1

The correct option is B Pseudocoelom

Echinoderms are exclusively marine invertebrates. They are spiny-skinned and possess a skeleton made up of calcium carbonate. They are coelomates and show radial symmetry. They have a unique water-driven tube system also known as the water vascular system which helps in respiration, feeding, and excretion.

Pseudocoelom is a fluid-filled false body cavity, a typical characteristic of nematodes.

Hence, option B is the correct answer.