Biology MCQs

Page No. 17

All insects have how many parts of legs?


a4


b2


c3


d6


View Answer 3

In mouth cavity of many molluscs there is a rasping tongue like structure_________provided with many horny teeth.


aLigule


bRadula


cMantle


dMuscle


View Answer Radula

It is stiff rod of special cells surrounded by connecive tissue present in the mid -dorsal region and appears in the embryos of all chordates


aPlacenta


bNotochord


cCranianta


dLigule


View Answer Notochord

The phylum chrordata comprise about how many species?


a25,000


b50,000


c100,000


d10,00,000


View Answer 50,000

Sub- phylum vertebrate is also known as__________?


aPisces


bCraniata


cAves


dAmphibia


View Answer Craniata

They are considered to be the most primitive and are surely the first of the vertebrates?


aFrogs


bReptiles


cAmphibinas


dJawless fishes


View Answer Jawless fishes

Scolidon or dog fish belong to the group of fishes called__________?


aCartilaginous fishes


bBony fishes


cRunning fishes


dJawless fishes


View Answer Cartilaginous fishes

Nephrostome in earthworm opens in____________?


aExternal space


bInternal Body cavity


cIn gut


dIn Bladder


View Answer Internal Body cavity

The nephridia of earthworm open into the coelom by_________?


aNephrostome


bNephridiopore


cFlame cell


dAnus


View Answer Nephrostome

Mammalian kidney, under restricted water supply can conserve water by over ________ % reabsorption of glomerular filtrate


a80.50%


b90.50%


c95.50%


d99.50%


View Answer 99.50%

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