A) jointed appendages
B) open blood vascular system
C) triploblastic
D) all of the above
Correct Answer: D
Solution :
Arthropoda is the largest phylum. It includes about 9,00,000 species. These have organ-system organisation and bilateral symmetry. They also have sclerotized exoskeleton. Phylum Arthropoda is divided into seven classes on the basis of body division, body appendages, habitat, organ of respiration and modes of excretion.
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