Biology MCQs

Page No. 58

Main blood vessel of arthropods usually:


aLies on dorsal side

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bLies on ventral side

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cLies on lateral side

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dIs not present

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View Answer Lies on dorsal side

Second largest phylum of invertebrates is____________?


aPorifera

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bArthropoda

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cMollusca

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dChordata

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View Answer Mollusca

Body is globular in_________?


aCake urchin

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bSea Urchin

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cSea cucumber

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dBrittle star

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View Answer Sea Urchin

Body is eel like in___________?


aCyclostomata

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bChondrichthyes

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cOsteichthyes

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dNone of these

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View Answer Cyclostomata

Notochord is present throughout life in___________?


aUrochordates

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bCephalochordates

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cChordates

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dVertebrates

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View Answer Cephalochordates

Which of the following fishes contained lungs?


aLamprey

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bPerch

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cPlaice

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dDipnoi

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View Answer Dipnoi

Mammals became dominant in__________?


aProterozoic era

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bMesozoic era

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cPaleozoic era

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dCenozoic era

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View Answer Cenozoic era

Which of the following are motile zooids in cnidarians?


aPolyps

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bMedusae

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cBoth of these

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dNone of these

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View Answer Medusae

In sponges fertilization takes place in____________?


aEctoderm

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bMesenchyme

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cEndoderm

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dUterus

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View Answer Mesenchyme

80% of the food of sponges consists of__________?


aDetrital organic particles

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bZooplankton and small animals

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cPhytoplanktons

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dall of these

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