Phylum Echinodermata: Class Ophiuroidea
Which of following is not present in ophiuroids?
pedicellariae only
branchiae only
vascular system
pedicellariae and branchiae
pedicellariae and branchiae
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Class Ophiuroidea includes a roundabout:A. 20000 species
B. 3000 species
C. 2000 species
D. 1000 species
Brittle stars and basket stars are included in class
A. 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
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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