641: Milk of the animals fed on grass contains large amounts of fat in:
(a) Summer
(b) Winter
(c) Spring
(d) Autumn
642: Biofilms are
(a) colour films used by biologists to photograph living organisms
(b) photomicrographs of microorganisms from various habitats
(c) accumulations of microorganisms at surfaces such as those of a rock, a tooth or an oil droplet
(d) photographic films made through fermentation processes of certain industrial microorganisms
643: The range of Agni-II missile is around
(a) 500 km
(b) 2000 km
(c) 3500 km
(d) 5000 km
644: The prices at which the Government purchases food grains for maintaining the public distribution system and for building up buffer-stocks is known as
(a) minimum support prices
(b) procurement prices
(c) issue prices
(d) ceiling prices
645: Consumption of fish is considered to be healthy when compared to flesh of other animals because fish contains
(a) polyunsaturated fatty acids
(b) saturated fatty acids
(c) essential vitamins
(d) more carbohydrates and proteins