276: Nobel Prize winning scientist James D. Watson is known for his work in which area ?
(a) Metallurgy
(b) Genetics
(c) Environmental protection
(d) Meteorology
277: Mycorrhizal biotechnology has been used in rehabilitating degraded sites because mycorrhiza enables the plants to
1. resist drought and increase absorptive area
2. tolerate extremes of pH
3. resist disease infestation
Select the correct answer using the codes given below.
(a) 1 only
(b) 1 and 3 only
(c) 2 and 3 only
(d) 1, 2 and 3
278: Which of the following statements about Mahatma Gandhi is correct in connection with India's independence?
(a) He was the happiest man
(b) He was a very disillusioned man
(c) He had full satisfaction about his achievements
(d) He was happy with the formation of Pakistan
279: A girl is swinging on a swing in sitting position. When the same girl stands up, the period of swing will
(a) be shorter
(b) be longer
(c) depend on the height of the girl
(d) not change
280: The I.N.A. was organised by Netaji Subhash Chandra Bose at
(a) Rangoon
(b) Singapore
(c) Taiwan
(d) Tokyo