Which of the following is incorrect for phylum Cnidaria?
A
Cnidocytes contain the stinging capsules called nematocytes
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B
Polyp is an umbrella-shaped and free-swimming
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C
Medusa sessile and cylindrical
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D
Both b and c
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Solution
The correct option is D Both b and c Cnidocytes are the characteristic features of phylum Cnidaria.
Cnidocytes contain the stinging capsules called nematocytes. Cnidarians exhibit two basic body forms called polyp and medusa. The polyp is a sessile and cylindrical form whereas the medusa is umbrella-shaped and free-swimming.