5.Mention any three characteristic features of phylum Cnidaria with one example .
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Characteristics:- The phylum includes jellyfish, sea anemone and coral. Characterized by a digestive cavity that forms the main body, they may have been the first animal group to reach the tissue level of organization. Cnidarians are radially symmetrical, jelly-like and have a nerve net and one bodyopening.
Explanation:
Characteristics of Cnidaria:
Radially Symmetrical.
Body multicellular, few tissues, some organelles.
Body contains an internal cavity and a mouth.
Two different forms exist, medusa and polyp.
Reproduction is asexual or sexual.
Has a simple net like nervous system.
Has a distinct larval stage which is planktonic
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