2071: Hybridisation is useful in developing improved crops by:
(a) Creating new and better genes
(b) Eliminating undesirable genes
(c) Producing favourable combination of genes
(d) By encouraging favourable genes and removing unfavourable ones
2072: In many developing countries, three major causes of death and disease are
(a) lack of safe drinking water, increasing use of pesticides and thinning of the ozone layer
(b) contaminated food, global warming and industrial chloro-fluoro-carbons
(c) polluted air, greenhouse effect and soil erosion
(d) dirty water, contaminated food and polluted air
2073: Human Development Index comprises literacy rates, life expectancy at birth and
(a) Gross Domestic Product per head in US dollars
(b) Gross Domestic Product per head at real purchasing power
(c) Gross National Product in US dollars
(d) National Income per head in US dollars
2074: Consider the following statements :
Hard water is not suitable for
I. drinking.
II. washing cloths with soap.
III. use in boilers.
IV. irrigating crops.
Which of these statements are correct ?
(a) I and III
(b) II and III
(c) I, II and IV
(d) I, II, III and IV
2075: Who among the following was not a writer of legal texts ?
(a) Yajnavalkya
(b) Manu
(c) Narada
(d) Bharavi