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Answer to Question #61638 in Other Biology for muhammad umar

Question #61638
1 Which of these is not true about the phylum echinodermata?
All have olfactory organs
Bodies are not metamerically segmented
Sexes are separate
Bodies are not metamerically segmented
2 Which of these is not a class of the phylum echinodermata?
arachnida
opliuroidea
crinoides
asteroidea
3 Sea Cucumber is an example of the class
holothuroidea
echinoidea
crinoides
opliuroidea
4 Brittle Star is an example of the class
opliuroidea,
echinoidea
crinoides
holothuroidea
5 Which of these is not true of star fish?
They are star shaped
Pedicellaria are present
Water vascular system is not used for gathering food
Possession of specialised jaw-like appendages
6 Vertebrata is a subphylum of the phylum
arthropoda
reptilia
amphibia
chordata
7 Which of these is not true of the chordates?
have tightly packed cells
have tubular nerve chords
they have no notochord
have gill slit at some stages
Expert's answer
1.All have olfactory organs - sense organs are poorly developed in these animals
2.arachnida -belong to arthropods
3.holothuroidea
4.ophiuroidea
5.Water vascular system is not used for gathering food
6.chordata
7.they have no notochord

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