Biology MCQs

Page No. 104

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


aAir

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bWater

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cLand

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dGravity

✓


View Answer Gravity

Percentage of proteins in cell membrane is____________?


a20-40%

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b40-50%

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c60-80%

✓


d80-100%

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View Answer 60-80%

_____________ supported theory of special creation?


aLinnaeus

✓


bAristotle

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cMendel

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dLamarck

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View Answer Linnaeus

In Hardy-Weinberg formula P2 represents frequency of_____________?


aRecessive allele

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bDominant allele

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cHomozygous dominant individual

✓


dHomozygous recessive individual

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


aTheodor Schwann and Schleiden

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bRudolph Virchows

✓


cLouis Pasteur

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dBoth b and c

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View Answer Rudolph Virchows

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


aVasodilation

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bActivation of sweat glands

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cThermogenesis

✓


dEvaporative cooling

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View Answer Thermogenesis

“lubb” sound is produced due to___________________?


aOpening of inlet valve

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bClosure of inlet valve

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cOpening of outlet valve

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dClosure of outlet valve

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Who coined the term CELL?


aSchwann

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bSchleiden

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cRobert Hook

✓


dBoth a and b

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View Answer Robert Hook

Ozone depletion occurs commonly due to_______________?


aCarbon dioxide

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bChlorofluorocarbons

✓


cUV rays

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dDeforestation

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View Answer Chlorofluorocarbons

Deoxygenated blood first enters in _________ part in fishes?


aSinus venosus

✓


bRight atrium

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cLeft atrium

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dConus arteriosus

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View Answer Sinus venosus

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