2641: Pumice is derived from:
(a) Volcanic rock
(b) Sedimentary rock
(c) Igneous rock
(d) Acid lava
2642: With reference to India, consider the following Central Acts:
1. Import and Export (Control) Act, 1947
2. Mining and Mineral Development (Regulation) Act, 1957
3. Customs Act, 1962
4. Indian Forest Act, 1927
Which of the above Acts have relevance to/bearing on the biodiversity conservation in the country?
(a) 1 and 3 only
(b) 2, 3 and 4 only
(c) 1, 2, 3 and 4
(d) None of the above Acts
2643: In the context of ancient Indian society, which one of the following terms does not belong to the category of the other three ?
(a) Kula
(b) Vamsa
(c) Kosa
(d) Gotra
2644: For developing inbred lines in farm animals, following factors are taken into consideration :
1. The crossbreds should be of outstanding type.
2. They should not carry any detrimental genes.
3. Progeney tested animals.
4. Herd size should be large.
Of the statements given above, which one of the following combinations of factors is most essential ?
(a) 1 and 3
(b) 2 and 3
(c) 1 and 4
(d) 2 and 4
2645: To know whether the rich are getting richer and the poor getting poorer, it is necessary to compare
(a) the wholesale price index over different periods of time for different regions
(b) the distribution of income of an identical set of income recipients in different periods of time
(c) the distribution of income of different sets of income recipients at a point of time
(d) the availability of foodgrains among two sets of people, one rich and the other poor, over different periods of time