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Q.
One of the special characters of Coelenterata only is the occurrence of
Animal Kingdom
Solution:
The name of the Phylum Cnidaria is due to the presence of cnidoblast/nematoblast or stinging cells. These cell contain nematocyst (Stinging organ). The nematocyst consists of capsule, shaft and thread tube. The nematocysts are used for defence and offence.