51. Pigmentation of skin is due to
52. Norepinephrine increases
53. Night blindness is cause by lack of which vitamin?
54. Monocot root differs from dicot root in having
55. Radioactivity is a phenomenon of the spontaneous emission of
56. Organic Substances which, in very small amounts, control growth and development called
57. Our major foods, fibres, spices, fruits and beverage crops are
58. Movements due to light are shown by
59. Outer covering of virus made up of protein is
60. Radish is a
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