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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
respiration
saliva production
blood pressure

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Biology
Night blindness is cause by lack of which vitamin?

Vitamin C
Vitamin D
Vitamin B
Vitamin A

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Biology
Monocot root differs from dicot root in having

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

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Biology
Radioactivity is a phenomenon of the spontaneous emission of

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

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