search
arrow-left Previous
Next arrow-right
Q: Which group of animals is named after their spiny skin and has a unique water vascular system that helps them in locomotion?
  • A. Hemichordata
  • B. Aschelminthes
  • C. Mollusca
  • D. Echinodermata
Correct Answer: Option D - Echinoderms are invertebrates that have a spiny skin made of calcium carbonate plates. They also have a water vascular system, which is a network of fluid-filled canals and tube feet that help them in movement, feeding, respiration and excretion. Some example of echinoderms are starfish, sea urchins, sand dollars and sea cucumbers.
D. Echinoderms are invertebrates that have a spiny skin made of calcium carbonate plates. They also have a water vascular system, which is a network of fluid-filled canals and tube feet that help them in movement, feeding, respiration and excretion. Some example of echinoderms are starfish, sea urchins, sand dollars and sea cucumbers.

Explanations:

Echinoderms are invertebrates that have a spiny skin made of calcium carbonate plates. They also have a water vascular system, which is a network of fluid-filled canals and tube feet that help them in movement, feeding, respiration and excretion. Some example of echinoderms are starfish, sea urchins, sand dollars and sea cucumbers.