Biology MCQs

1496 MCQs  — Everyday Science MCQs  (Page 21 of 150)

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An infectious disorder of respiratory system is_________________?
A. Cancer
B. Asthma
C. Tuberculosis
D. Emphysema
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Cuticular transpiration is _____________ of total transpiration?
A. 1-2%
B. 3-4%
C. 5-7%
D. 90%
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According to cohesion-tension theory, tension is created by__________________?
A. Hydrogen bonding
B. Transpiration
C. Adhesion
D. Root prerssure
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Deoxygenated blood first enters in _________ part in fishes?
A. Sinus venosus
B. Right atrium
C. Left atrium
D. Conus arteriosus
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Ozone depletion occurs commonly due to_______________?
A. Carbon dioxide
B. Chlorofluorocarbons
C. Uv rays
D. Deforestation
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Who coined the term CELL?
A. Schwann
B. Schleiden
C. Robert hook
D. Both a and b
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“lubb” sound is produced due to___________________?
A. Opening of inlet valve
B. Closure of inlet valve
C. Opening of outlet valve
D. Closure of outlet valve
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In condition of high temperature, following does not occur or occurs at low level__________?
A. Vasodilation
B. Activation of sweat glands
C. Thermogenesis
D. Evaporative cooling
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Who first observed and thus hypothesized that new cells are formed from previously existing living cell?
A. Theodor schwann and schleiden
B. Rudolph virchows
C. Louis pasteur
D. Both b and c
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In Hardy-Weinberg formula P2 represents frequency of_____________?
A. Recessive allele
B. Dominant allele
C. Homozygous dominant individual
D. Homozygous recessive individual
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Word of the Day
12 Jul
Obdurate
stubbornly refusing to change one’s opinion or course of action.
ضدی، بدکار، سنگدلی

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