|
The presence of the tube feet is a characteristic feature of the phylum |
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|
a) |
Arthropoda |
b) |
Annelida |
c) |
Nemathelminthes |
d) |
Echinodermata |
|
The presence of the tube feet is a characteristic feature of the phylum |
|||||||
|
a) |
Arthropoda |
b) |
Annelida |
c) |
Nemathelminthes |
d) |
Echinodermata |
(d)
Echinoderms are characterized by the presence of a well developed water vascular system (a system of water filled canals) which provides Hydraulic power for thousands of tube feet which are sac like protrusions of body wall used for locomotion, feeding and respiration.