The absence of head, unsegmented body, and endoskeleton of dermal calcareous plate are the characters of
A
Mollusca
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B
Arthropoda
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C
Echinodermata
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D
None of the above
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Solution
The correct option is CEchinodermata
Echinoderms belong to phylum Echinodermata. They are marine animals. They are spiny-skinned animals. They have a nervous system but no brain or head in adults. Their body is unsegmented. The endoskeleton is known as a test and it is made up of calcium plates or ossicles with protruding spines.