231: Which one of the following approaches comes under the category of biotechnology?
(a) Use of living organisms or substances obtained from them in industrial processes
(b) Modernizing the commercial industries to produce products for use in biological research
(c) Use of modern technology to investigate biological disorders
(d) Use of industrial technology to increase the biosphere
232: Assertion (A):
Marathas emerged as the strongest native power in India after the decline of Mughal empire.
Reason (R):
Marathas were the first to have clear concept of a united Indian nation.
(a) Both A and R are individually true and R is the correct explanation of A
(b) Both A and R are individually true but R is NOT the correct explanation of A
(c) A is true but R is false
(d) A is false but R is true
233: 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
234: The average salary of skilled employees in a firm is Rs. 520 and that of the unskilled employees is Rs. 420. If the average salary of both the groups of employees is Rs. 500, then the percentage of skilled employees in the firm is
(a) 50
(b) 20
(c) 80
(d) 70
235: Mahatma Gandhi was referred to as the "Father of the nation" first by
(a) Jawaharlal Nehru
(b) Vallabhbhai Patel
(c) C. Rajagopalachari
(d) Subhash Chandra Bose