636: Stripes on the back of the animals are the indication of:
(a) Mating habit
(b) Food habit
(c) Cave dwelling
(d) Matching of skin colour with surroundings
637: For which one of the following, is Satara well-known?
(a) Nuclear power plant
(b) Wind energy plant
(c) Thermal Power plant
(d) Hydro-electric plant
638: Which one of the following is the best strategy for environment-friendly sustainable development in Indian agriculture?
(a) Expansion of cultivable land, increased use of superphosphate, urea and effective biocides
(b) Wider popularization of high-yielding crop varieties, better and more frequent irrigation and increased frequency of aerial sprays of inorganic fertilizers and pesticides
(c) Mixed cropping, organic manures, nitrogen-fixing plants and pest resistant crop varieties
(d) Improved farm implements and machinery, use of potent insecticides to minimise post-harvest grain losses and mono culture cropping practices
639: In the context of ancient Indian society, which one of the following terms does not belong to the category of the other three ?
(a) Kula
(b) Vamsa
(c) Kosa
(d) Gotra
640: The offending substance in the liquor tragedies leading to blindness, etc. is
(a) ethyl alcohol
(b) amyl alcohol
(c) benzyl alcohol
(d) methyl alcohol