Everyday Science MCQs

5120 MCQs  (Page 399 of 512)

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Notochord is present throughout life in___________?
A. Urochordates
B. Cephalochordates
C. Chordates
D. Vertebrates
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Body is eel like in___________?
A. Cyclostomata
B. Chondrichthyes
C. Osteichthyes
D. None of these
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Body is globular in_________?
A. Cake urchin
B. Sea urchin
C. Sea cucumber
D. Brittle star
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Which of the following are motile zooids in cnidarians?
A. Polyps
B. Medusae
C. Both of these
D. None of these
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Mammals became dominant in__________?
A. Proterozoic era
B. Mesozoic era
C. Paleozoic era
D. Cenozoic era
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Which of the following fishes contained lungs?
A. Lamprey
B. Perch
C. Plaice
D. Dipnoi
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Sperms released in water are carried to the mesenchyme in sponges by__________?
A. Amoeboid cell
B. Stipules
C. Spicules
D. Spines
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The single main opening of the sponge cavity is____________?
A. Osculum
B. Ostia
C. Spongocoel
D. None of these
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80% of the food of sponges consists of__________?
A. Detrital organic particles
B. Zooplankton and small animals
C. Phytoplanktons
D. All of these
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In sponges fertilization takes place in____________?
A. Ectoderm
B. Mesenchyme
C. Endoderm
D. Uterus
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Word of the Day
27 Jul
Widen
make or become wider.
چوڑا ہونا، کشادہ کرنے کا عمل

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