Biology MCQs

Page No. 60

Inner layers of the sponges are made up of__________?


aPinacocytes


bChoanoderm


cChoanoytes


dPinacoderm


View Answer Choanoytes

Sperms are _________ in origin.


aEctodermal


bMesodermal


cEndodermal


dNone of these


View Answer Mesodermal

Gut in pseudocoelomates is made from___________?


aEctoderm


bMesoderm


cEndoderm


dAll of these


View Answer Endoderm

The skeleton of the sponges is in the form of variously shaped needle like structures called___________?


aStripules


bSpicules


cBrails


dSpines


View Answer Spicules

The internal buds are known as__________?


aSpicules


bChoanocytes


cGemmules


dNone of these


View Answer Gemmules

Venus flower basket is also known as___________?


aSycon


bEuplectella


cLeucoselenia


dSpongilla


View Answer Euplectella

In acoelomates gut is ________ in origin.


aEctodermal


bEndodermal


cMesodermal


dNone of these


View Answer Endodermal

The system well developed in the acoelomate is___________?


aExcretory system


bNervous system


cTransport system


dAll of these


View Answer All of these

The fate of each blastomere is foretold. The cleavage will be as____________?


aSpiral and indeterminate


bRadial and indeterminate


cRadial and indeterminate


dSpiral and determinate



All the animals of the grade radiata are____________?


aDiploblastic


bTriploblastic


cBoth


dUnicellular


View Answer Diploblastic

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