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Write Down Four General Characters of Porifera. Give Two Examples. - Science

Short Note

Write down four general characters of Porifera. Give two examples.

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General characteristics of Porifera:
(i) These are the simplest multicellular, diploblastic animals.
(ii) They are asymmetrical or radially symmetrical.
(iii) Their cells are loosely held together in a gelatinous matrix, mesoglea and do not form tissues.
(iv) Skeleton is made up of minute calcareous or silicious spicules or spongin fibre (collagen) or both.
Examples: Sycon and Spongilla.

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P S Verma and V K Agarwal Class 9 Biology - Science Part 3
Chapter 4 Diversity in Living Organisms
Short Questions Answer ( Carrying 2 Marks) | Q 25 | Page 259
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