Question

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

• A. Covered with hard outside layer
• B. Ability to regenerate
• C. They are motile
• D. Asymmetrical body

Answer 1

The correct option is C They are motile

The word Porifera means organisms with pores. They bear numerous pores on their body which helps in circulation of substances. They are non-motile organisms and are always attached to substratum. They have a hard exoskeleton, made up of calcium carbonate or silica. Most of the poriferans have an asymmetrical body and they have a good ability of regeneration.