1 .
Stomata Opens and closes due to
A.  Turgor pressure of guard cells
B.  Root pressure
C.  Positive pressure
D.  Imbibitional pressure
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2 .
Say's Law of Market holds that
A.  supply is not equal to demand
B.  supply creates its own demand
C.  demand creates its own supply
D.  supply is greater than demand
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3 .
Tyndall effect is due to
A.  Refraction
B.  Dispersion
C.  Brownian Motion
D.  Reflection
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4 .
Buoyancy of a tax is defined as
A.  percentage increase in tax revenue/ percentage increase in tax base
B.  increase in tax revenue/percentage increase in tax coverage
C.  increase in tax revenue/increase in tax base
D.  percentage increase in tax revenue/ increase in tax coverage
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5 .
Life-cycle of human malarial parasite in Anopheles mosquito was first discovered by
A.  Ronald Ross
B.  Laveran
C.  Grassi
D.  Garnham
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6 .
Which of the following drugs was not isolated from a natural source ?
A.  Quinine
B.  Morphine
C.  Isoniazid
D.  Artemisinin
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7 .
The rate of heart beat of an elephant is about
A.  25 times/minutes
B.  72 times/minute
C.  150 times/minute
D.  300 times/minute
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8 .
The causative organism of 'Kala - azar' is
A.  Trypanosoma gambiense
B.  Leishmania donovani
C.  Plasmodium vivax
D.  Trichomonas vaginalis
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9 .
It is possible to store pollen grains of a large number of species for years in
A.  Liquid hydrogen
B.  Liquid oxygen
C.  Solid hydrogen
D.  Liquid nitrogen
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10 .
While ascending a hill, the driver of the vehicle keeps the gear ratio
A.  equal to 1
B.  less than 1
C.  greater than 1
D.  either equal to or greater than 1
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