2691: 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
2692: Consider the following statements:
1. Agricultural soils release nitrogen oxides into environment.
2. Cattle release ammonia into environment.
3. Poultry industry releases reactive nitrogen compounds environment.
Which of the statements given above is/arc correct?
(a) 1 and 3 only
(b) 2 and 3 only
(c) 2 only
(d) 1, 2 and 3
2693: A hydrogen inflated polythene balloon is released from the surface of the earth. As the balloon rises to an altitude up in the atmosphere, it will
(a) Decrease in size
(b) Flatten into a disc-like shape
(c) Increase in size
(d) Maintain the same size and shape
2694: Tamil Nadu is a leading producer of mill made cotton yam in the country. What could be the reason ?
1. Black cotton soil is the predominant type of soil in the State.
2. Rich pool of skilled labour is available.
Which of the above is/are the correct reasons ?
(a) 1 only
(b) 2 only
(c) Both 1 and 2
(d) Neither 1 nor 2
2695: According to the World Development Report, low income economies are those for which the per capita GNP in 1994 was
(a) US $ 925 or less
(b) US $ 825 or less
(c) US $ 725 or less
(d) US $ 525 or less