Identify the animal group having : (a) Bones light and hollow. (b) Soft body animals supported by calcareous shells. (c) Body spiny skinned and triploblastic. (d) Body is cylindrical rather flattened. (e) Jointed legs. (f) Body differentiation in segmental fashion.
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A)aves or birds
C)reptiles
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a) aves
b) mollusca
c) echinodermata
d) nematoda
e) arthropoda
f) annelida
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