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Question

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

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

The correct option is B 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.

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