Answer to Question #61638 in Biology for muhammad umar

Question

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

Answer 1

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