Question

29. Which is the characteristic feature of Echinodermata: (1) Smooth skin and radial symemtry (2) Spiny skin and riadl symmetry (3) Spiny skin and bilateral symetry (4) Smooth skin and bilateral symmetry​

Answer 1

Answer:

Radial symmetry, radial canal, vascular system, and ambulacral system are the unique characteristics of phylum Echinodermata. Thus the correct answer is option 'E'. Note: Echinoderms are poisonous and have sharp spines on their body which causes injury. Echinoderms are used for food.