Question

Write two distinction features of phylum porifera.​

Answer 1

Answer:

Characteristic Features of Phylum Porifera

Their bodies are asymmetrical. Body shape can be cylindrical, vase-like, rounded or sac-like. They are diploblastic animals with two layers, the outer dermal layer and the inner gastral layer. There is a gelatinous, non-cellular mesoglea, in between these two layers.

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Answer 2

Answer:

Explanation:

Some of the important characteristics of phylum Porifera are mentioned below.

• The cells of Poriferans are loosely organized.

• They are mostly found in marine water. Only a few are found in freshwater.

• They are either radially symmetrical or asymmetrical.

• Their body is usually cylindrical.

• The scleroblast secretes spicules while spongin fibres are secreted by spongioblasts.

• They have no organs in their body.

• They depict cellular grade of organization.

• The body comprises numerous pores known as Ostia and osculum.

• The central cavity is called spongocoel or atrium which opens to the outside through the osculum.

• They reproduce asexually by budding, and fragmentation.