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BIOLOGY

Biology
Pigmentation of skin is due to

melanocytes
leucocytes
lymphocytes
monocytes

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Biology
Norepinephrine increases

saliva production
blood pressure
respiration
urine production

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Biology
Night blindness is cause by lack of which vitamin?

Vitamin C
Vitamin B
Vitamin A
Vitamin D

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Biology
Monocot root differs from dicot root in having

well developed pith
open vascular bundles
radially arranged vascular bundles
scattered vascular bundles

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Biology
Radioactivity is a phenomenon of the spontaneous emission of

electrons (beta particles)
gamma rays (short wave electromagnetic waves)
All of these
protons (alpha particles)

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