246: Which among the following acts as a resistance against disease in the body?
(a) Vitamins
(b) Carbohydrates
(c) Red Corpuscles
(d) White Corpuscles
247: River Luni drains into:
(a) Ganga delta
(b) Kerala coast
(c) Rann of Kutchh
(d) Godavari delta
248: According to the World Development Report, low income economies are those for which the per capita GNP in 1994 was
(a) US $ 925 or less
(b) US $ 825 or less
(c) US $ 725 or less
(d) US $ 525 or less
249: Azolla gives a good biofertilizer when mixed with:
(a) Blue-green algae
(b) Cow dung
(c) Bone-meal
(d) Urea
250: The hallmark of watershed development in the semi-arid regions of India is the
(a) establishment of sheds on large scale, so that the rain water does not evaporate
(b) undertaking of earthworks, soil conservation measures and tree plantation, so as to conserve soil moisture and recharge underground water
(c) drilling deep tubewells so as to tap water at the rock-strata level
(d) setting up a system of tanks by banking water from seasonal rivers