Question
Identify animal groups having:
- Soft bodied animals supported by calcareous shells.
- Spiny body has radial body symmetry.
- Bones light and hollow.
- Four pairs of jointed legs and no wings.
- Extemal ear or pinna.
✓
Answer
- Mollusca.
- Echinoderrnata.
- Aves.
- Arachnida.
- Mammalia.
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