1.

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.

Answer»

(a) Echinodermata

(b) Aves 

(c) Mollusc 

(d) Arthropoda



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