3626: Mulching the soil is a process whereby:
(a) Big pieces of soil are broken down into smaller pieces
(b) The field is irrigated at regular intervals
(c) Transplanting of seedlings take place
(d) Loose material, dung, etc. are laid on the ground to prevent excessive evaporation or erosion of the soil
3627: 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
3628: The chief ingredient of the mosquito repellent cream is derived from:
(a) Tulsi
(b) Neem
(c) Lemon
(d) Rice bran
3629: Among living organisms, which one of the following is the most responsible factor for bringing about the origin of a new species?
(a) Isolation
(b) Mutation
(c) Natural Selection
(d) Sexual Reproduction
3630: Gautam Buddha attained Nirvana at:
(a) Bodh Gaya
(b) Sarnath
(c) Kushi Nagar
(d) Lumbini