Question

identify the animal group having : 1 body spiny and radial symmetry 2 bones light and hollow 3 soft bodies animal support by calcareous shell

Answer 1

The animals which has calcareous spicules is Echinodermata

Answer 2

1. Some of the marine bodies mostly invertebrates such as starfishes, urchins and sea cucumbers have spiny body and radial symmetry. They all come under a phylum called Echinodermata.

2. Some animals which have light bones that are hollow and are vertebrates such as ostriches, woodpeckers, etc. They come under the phylum called Chordate.  

3. Some of the invertebrate animals which are protected by calcareous shell that lack in symmetry like snail, mussels and oysters have soft bodies. They come under a phylum called Mollusca.