Question

18. Member of which of the following groups are exclusively marine and have water vascular
system to move around ?
[ ]
a) Nematoda
b) Annelida
c) Arthropoda d) Echinodermata​

Answer 1

Answer:

( d ) Echinodermata

Because water vascular system is the hydraulic system which is used in food and water transport,

locomotion and respiration in Echinodermata.

Answer 2

Answer:

d) Echinoderm

Explanation:

Echinoderm is the common name given to any member of the phylum Echinodermata of marine animals. The adults are recognizable by their radial symmetry, and include starfish, sea urchins, sand dollars, and sea cucumbers, as well as the sea lilies or "stone lilies". Echinoderms are found at every ocean depth, from the intertidal zone to the abyssal zone. The phylum contains about 7000 living species, making it the second-largest grouping of deuterostomes, after the chordates. Echinoderms are also the largest phylum that has no freshwater or terrestrial (land-based) representatives.