Biology MCQs

Page No. 59

The single main opening of the sponge cavity is____________?


aOsculum


bOstia


cSpongocoel


dNone of these


View Answer Osculum

Sperms released in water are carried to the mesenchyme in sponges by__________?


aAmoeboid cell


bStipules


cSpicules


dSpines


View Answer Amoeboid cell

The skeleton of sponges is made up of___________?


aCalcium


bSilica


cBoth of these


dNone of these


View Answer Both of these

The sponges in which sperms develop first are included in the category of__________?


aPeritandrous


bPertandrous


cProtendrous


dProtandrous


View Answer Protandrous

A sponge of Antarctica which is more than a meter tall is____________?


aScolymastra joubini


bEuplectella


cSpongilla


dLeucoselenia


View Answer Scolymastra joubini

The function of coelom is__________?


aTo increase the size of the animals


bTo help in the functioning of reproductive system


cTo provide space for the development of organs and systems


dNone of these



In most triploblasts after embryonic development the three layers are represented as___________?


aSeparate layers of cells


bStructures formed from them


cStructures associated with them


dTheir functions in body



Of the following which one is not found in series proterostomia?


aAnnelida


bArthropoda


cMollusea


dEchinodermata


View Answer Echinodermata

Coelom that develops from the archenteron as outpouching is__________?


aPseudocoelom


bEnterocoelom


cSchizocoelom


dNone of these


View Answer Enterocoelom

Of the following which one is not included in Proterostomes?


aArthropods


bHemichordates


cAnnelids


dMolluses


View Answer Hemichordates

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