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Identify the correct characteristics of porifera.

  1. Commonly known as sea walnuts.

  2. Presence of ostia and collar cells.

  3. Exhibit tissue level of characteristics. 

  4. It is the largest phylum of animal kingdom.

  5. The body is supported by spicules and sponging fibers.

  6. Contains cnidocytes which is used for defense, anchorage and capturing of prey.

A. (ii), (v) only

B. (i), (ii), (vi) only

C. (i), (ii), (iii), (iv) only

D. All of these.

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