Match the following groups of organisms with their respective distinctive characteristics and select the correct option:
Organisms: (a) Platyhelminthes, (b) Echinodermata, (c) Hemichordata, (d) Cnidaria Characteristics: (i) Stomochord, (ii) Cnidoblasts, (iii) Flat body, (iv) Water vascular system
(a)-(iii), (b)-(iv), (c)-(i), (d)-(ii)
(a)-(ii), (b)-(iii), (c)-(iv), (d)-(i)
(a)-(iv), (b)-(i), (c)-(ii), (d)-(iii)
(a)-(i), (b)-(ii), (c)-(iii), (d)-(iv)
members of the phylum Platyhelminthes possess a dorso-ventrally flattened body, which is why they are commonly referred to as flatworms . The phylum Echinodermata is uniquely characterised by a water vascular system that assists in locomotion, respiration, and capturing food . Hemichordata members are identified by a rudimentary structure in the collar region known as a stomochord . Finally, the phylum Cnidaria (Coelenterata) is named after the cnidoblasts or cnidocytes present on their tentacles and body, which are used for anchorage, self-defence, and capturing prey . Matching these characteristics leads to the sequence (iii), (iv), (i), and (ii).
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