826: Extrusive (Intrusive) rocks are forms of:
(a) Igneous rocks
(b) Sedimentary rocks
(c) Metamorphic rocks
(d) None of the above
827: Proportional representation is NOT necessary in a country where
(a) there are no reserved constituencies
(b) a two-party system has developed
(c) the first-past-post system prevails
(d) there is a fusion of Presidential and Parliamentary forms of governments
828: A passing motorcycle causes distortion or disturbance with reception of signal in radio and T.V. The cause of this is
(a) The intense sound waves effect the small electronic devices of the receptor
(b) The vehicle's metal parts block/distort the radio waves
(c) The spark plug fitted in the engine produces electro-magnetic signals due to sparking
(d) Modern motor-cycles are fitted with electric ignition system which produces radio waves
829: Indian farmers are unhappy over the introduction of Terminator Seed Technology because the seeds produced by this technology are expected to
(a) show poor germination
(b) form low-yielding plants despite the high quality
(c) give rise to sexually sterile plants
(d) give rise to plants incapable of forming viable seeds
830: Which of the following crops has the highest photosynthetic activity?
(a) Cotton
(b) Sugarcane
(c) Rice
(d) Wheat