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BIOLOGY

Biology
Pigmentation of skin is due to

melanocytes
lymphocytes
monocytes
leucocytes

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Biology
Norepinephrine increases

urine production
saliva production
respiration
blood pressure

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Biology
Night blindness is cause by lack of which vitamin?

Vitamin C
Vitamin D
Vitamin A
Vitamin B

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Biology
Monocot root differs from dicot root in having

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

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Biology
Radioactivity is a phenomenon of the spontaneous emission of

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

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