Biology MCQs

Page No. 58

Main blood vessel of arthropods usually:


aLies on dorsal side


bLies on ventral side


cLies on lateral side


dIs not present


View Answer Lies on dorsal side

Second largest phylum of invertebrates is____________?


aPorifera


bArthropoda


cMollusca


dChordata


View Answer Mollusca

Body is globular in_________?


aCake urchin


bSea Urchin


cSea cucumber


dBrittle star


View Answer Sea Urchin

Body is eel like in___________?


aCyclostomata


bChondrichthyes


cOsteichthyes


dNone of these


View Answer Cyclostomata

Notochord is present throughout life in___________?


aUrochordates


bCephalochordates


cChordates


dVertebrates


View Answer Cephalochordates

Which of the following fishes contained lungs?


aLamprey


bPerch


cPlaice


dDipnoi


View Answer Dipnoi

Mammals became dominant in__________?


aProterozoic era


bMesozoic era


cPaleozoic era


dCenozoic era


View Answer Cenozoic era

Which of the following are motile zooids in cnidarians?


aPolyps


bMedusae


cBoth of these


dNone of these


View Answer Medusae

In sponges fertilization takes place in____________?


aEctoderm


bMesenchyme


cEndoderm


dUterus


View Answer Mesenchyme

80% of the food of sponges consists of__________?


aDetrital organic particles


bZooplankton and small animals


cPhytoplanktons


dall of these



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