Which among the following is not a characteristic feature of phylum Arthropoda?

Which among the following is not a characteristic feature of phylum Arthropoda?

Q. Which among the following is not a characteristic feature of phylum Arthropoda?

A.            Radial symmetry

B.            Jointed appendages

C.            Open circulatory system

D.            Chitinous exoskeleton

Answer: A

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