491: What is the approximate mean velocity with which the Earth moves round the Sun in its orbit ?
(a) 20 km/s
(b) 30 km/s
(c) 40 km/s
(d) 50 km/s
492: Malaria fever is caused
(a) Immediately after mosquito bite
(b) Upon disintegration and bursting of red blood cells
(c) When the malaria causing germs reach the liver
(d) Upon release of toxins into blood
493: Ilbert Bill was prepared for abolishing judicial disqualification based on racial distinction. The bill was vehemently criticised by the Europeans living in India. Who was the Governor-General at that time?
(a) Lord Ripon
(b) Lord Dalhousie
(c) Lord Curzon
(d) Lord Chelmsford
494: Which one of the following is the best description of the term 'ecosystem'?
(a) A community of organisms interacting with one another.
(b) That part of the Earth which is inhabited by living organisms.
(c) A community of organisms together with the environment in which they live
(d) The flora and fauna of a geographical area
495: Which one of the following countries recently upgraded its defence agency to a full defence ministry?
(a) Switzerland
(b) Japan
(c) Italy
(d) Thierry Henry