Question

charecterestic of porifera

Answer 1

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Poriferans are commonly called sponges.

These are multicellular organismswhich are sessile/sedentary in nature.

Most of them are marine while a few are fresh water forms.

Body is cylindrical, asymmetrical or has radial symmetry.

Body wall is diploblastic which consists of an outer layer called pinacoderm and an inner layer called choanoderm.

Answer 2

1. Pores are present all over the body
2. These animals covered with a hard outside layer or skeleton
3. They are commonly called sponges
4. They are mainly found in marine habitat
5. The body design involves very minimal differentiation and division into tissues
6. These are non mobile animals attache to some solid support
Examples = sycon, spongilla, euplectelea


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