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Identify the animal group having: (a) Body spiny and radial symmetry. (b) Bones light and hollow. (c) Soft-bodied animals supported by calcareous shells. (d) Four pairs of jointed legs, head and thorax fused. |
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Answer» (a) Echinodermata (b) Aves (c) Mollusc (d) Arthropoda |
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