
A. All have olfactory organs
B. Bodies are not metamerically segmented
C. Sexes are separate
D. Bodies are not metamerically segmented
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A. arachnida
B. opliuroidea
C. crinoides
D. asteroidea
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A. holothuroidea
B. echinoidea
C. crinoides
D. opliuroidea
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A. opliuroidea,
B. echinoidea
C. crinoides
D. holothuroidea
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A. They are star shaped
B. Pedicellaria are present
C. Water vascular system is not used for gathering food
D. Possession of specialised jaw-like appendages
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A. arthropoda
B. reptilia
C. amphibia
D. chordata
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A. have tightly packed cells
B. have tubular nerve chords
C. they have no notochord
D. have gill slit at some stages
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A. notochord
B. gill slits
C. tubular nerve chords
D. flexible rod of tightly packed cells
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A. possession of endoskeleton
B. have a well developed sense organs
C. have backbones
D. bodies are not bilaterally symmetrical
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A. Pisces
B. Protozoa
C. Amphibia
D. Aves
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