Question

Water vascular system is a feature of
1. King carb
2. Asterias
3. Balanoglossus
4. Sponges

Answer 1

Correct Answer - Option 2 : Asterias

Concept:

• Echinodermata is the phylum of kingdom Animalia.
• Echinodermata have an endoskeleton of calcareous ossicles, so these are named Echinodermata.
• Member of Echinodermata phylum is all marine animals with the organ-system level of organization.
• Echinodermata are triploblastic.

Explanation:

• Echinoderms have the unique feature of the presence of a water vascular system which has the following purpose:
  • Locomotion
  • Capture and transport of food
  • Respiration

Asterias is an example of Echinoderm therefore they have a water vascular system.

• Unique features of different phyla- 
  • Porifera- also known as spores because they have pores.
  • Coelenterata- also known as cnidaria because they have cnidoblasts.
  • Ctenophora- also known as sea walnuts or comb jellies. And they have comb plates.
  • Platyhelminthes- also known as flatworms because they have a flat body.
  • Aschelminthes- also known as roundworms because the body has a circular cross-section.
  • Annelida- Body segmentation
  • Arthropoda- They have joint appendages.
  • Mollusca- Body covered with a calcareous shell.
  • Echinodermata- Water vascular system.
  • Hemichordata- The body is made up of proboscis, collar, and trunk.
  • Chordata- Notochord, a dorsal hollow nerve, and paired pharyngeal gill slits.