A) Insects have one pair of antenna
B) Millipeds possess two pairs of appendages in each segment of the body
C) Prawns have two pairs of antenna
D) Animals belonging to th8 phylum-Porifera have nematocyst
Correct Answer: D
Solution :
Nematocysts are the stinging capsules produced by the cnidocytes or cnidoblasts present on the tentacles and the body of the animals belonging to the phylum-Coelenterata (Cnidaria). Cnidoblasts are used for anchorage, defense and for the capture of prey.
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