Phylum Echinodermata: Class Ophiuroidea
Class Ophiuroidea includes a roundabout:
20000 species
3000 species
2000 species
1000 species
2000 species
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Brittle stars and basket stars are included in classA. asteroidea
B. Ophiuroidea
C. Echinoidea
D. crinoidea
Mode of nutrition in ophiuroids is:
A. predator only
B. scavengers only
C. decomposers
D. predators and scavengers
Central disk of members of class Ophiuroidea, having
A. hexagonal shape
B. pentagonal shape
C. round shape
D. wrinkle shape
Which of following is not present in ophiuroids?
A. pedicellariae only
B. branchiae only
C. vascular system
D. pedicellariae and branchiae
Ampullae is absent in:
A. sea stars
B. brittle stars
C. star fish
D. none of above
Unbranched arms of brittle star range in size from:
A. 2-4 cm
B. 1-3 cm
C. 4-6 cm
D. 0.1-5 cm
Locomotory organ in brittle star is:
A. its arms
B. water vascular system
C. muscles
D. tubes
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