Biology MCQs

Page No. 104

Which of the following is most constant abiotic component of ecosystem___________?


aAir


bWater


cLand


dGravity


View Answer Gravity

Percentage of proteins in cell membrane is____________?


a20-40%


b40-50%


c60-80%


d80-100%


View Answer 60-80%

_____________ supported theory of special creation?


aLinnaeus


bAristotle


cMendel


dLamarck


View Answer Linnaeus

In Hardy-Weinberg formula P2 represents frequency of_____________?


aRecessive allele


bDominant allele


cHomozygous dominant individual


dHomozygous recessive individual



Who first observed and thus hypothesized that new cells are formed from previously existing living cell?


aTheodor Schwann and Schleiden


bRudolph Virchows


cLouis Pasteur


dBoth b and c


View Answer Rudolph Virchows

In condition of high temperature, following does not occur or occurs at low level__________?


aVasodilation


bActivation of sweat glands


cThermogenesis


dEvaporative cooling


View Answer Thermogenesis

“lubb” sound is produced due to___________________?


aOpening of inlet valve


bClosure of inlet valve


cOpening of outlet valve


dClosure of outlet valve



Who coined the term CELL?


aSchwann


bSchleiden


cRobert Hook


dBoth a and b


View Answer Robert Hook

Ozone depletion occurs commonly due to_______________?


aCarbon dioxide


bChlorofluorocarbons


cUV rays


dDeforestation


View Answer Chlorofluorocarbons

Deoxygenated blood first enters in _________ part in fishes?


aSinus venosus


bRight atrium


cLeft atrium


dConus arteriosus


View Answer Sinus venosus

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