Question

Which of the following is not a characteristic of organisms belonging to phylum Porifera?

• A. They are non-motile and attached to some solid support.
• B. They have holes or pores all over the body for circulation.
• C. Covered with hard outer skeleton or exoskeleton.
• D. Well differentiated body plan.

Answer 1

The correct option is D Well differentiated body plan.

The term Porifera means organisms with pores. They are non-motile organisms and are attached to some solid support. They have holes or pores all over the body for circulation. They have a hard exoskeleton, which provides rigidity. They are the least developed of all animal phyla, and hence have a body design that involves minimum differentiation.