Locomotory organs of echinoderms are:
Tube feet are many small tubular projections found on the oral face of echinoderm arms.
They are characteristic of the water vascular system of echinoderms.
They are locomotory organs and helps in locomotion, respiration and feeding etc.
So, the correct answer is option A.
Match the animal names listed under column I with the zoological names given under column II and select the correct option from the given codes. Column I (Common name) Column II (Zoological name) A. Starfish (i) Sepia B. Jellyfish (ii) Asterias C. Devilfish (iii) Aurelia D. Cuttlefish (iv) Octopus (v) Hippocampus
Match the column A with column B and choose the correct option. Column A Column B A. Porifera i. Canal system B. Aschelminthes ii. Water-vascular system C. Annelida iii. Muscular pharynx D. Arthropoda iv. Jointed appendages E. Echinodermata v. Metameres
Open circulatory system is present in (i)______ and (ii)______.
Hard calcium carbonate structures are used as a skeleton by: A. Echinodermata B. protochordata C. Arthopoda D. Nematoda
Which of the following organisms has the water vascular system as a distinctive feature?
Match the column A with column B and choose the correct option. Column A Column B A. Porifera i. Canal system B. Aschelminthes ii. Water-vascular system C. Annelida iii. Muscular pharynx D. Arthropoda iv. Jointed appendages E. Echinodermata v. Metameres
Water vascular system is found in
Aristotle's lantern is found in