66: When one gene controls two or more different characters simultaneously, the phenomenon is called
(a) Apomixis
(b) Pleiotropy
(c) Polyploidy
(d) Polyteny
67: Assertion (A):
West-flowing rivers of Peninsular India have no deltas.
Reason (R):
These rivers do not carry any alluvial sediments.
(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
68: Consider the following statements:
1. Liquefied Natural Gas (LNG) is liquefied under extremely cold temperatures and high pressure to facilitate storage or transportation in specially designed vessels.
2. First LNG terminal in India was built in Hassan.
3. Natural Gas Liquids (NGL) are separated from LPG and these include ethane, propane, butane and natural gasoline.
Which of the statements given above is/are correct?
(a) 1 only
(b) 2 and 3
(c) 1 and 3
(d) 1, 2 and 3
69: Match List I with List II and select the correct answer by using the codes given below the lists :
List I---------------List II
(Author)-----------(Text)
I. Varahamihira-----(A) Prabandha Chintamani
II. Visakhadatta----(B) Mrchchhakatikam
III. Sudraka--------(C) Brhat-Samhita
IV. Bilhana---------(D) Devi Chandraguptam
-------------------(E) Vikramankadevacharita
Codes:
(a) I-C, II-D, III-E, IV-B
(b) I-C, II-D, III-B, IV-E
(c) I-E, II-C, III-D, IV-A
(d) I-A, II-C, III-E, IV-B
70: Acid precipitation is now regarded as a serious problem in some European and Asian countries. Its major cause or source is
(a) discharge of acidic effluents onto neutral or slightly alkaline land where the acidic components precipitate
(b) emissions of sulphur oxides and nitrogen oxides from thermal power plants and burning of fossil fuels; these oxides dissolve in atmospheric water vapour and fall back on earth as acid rain
(c) natural carbon dioxide released during respiration of living organisms dissolves in water, forming carbonic acid which is the chief contributor to acidity in rain water
(d) chloro-fluoro-carbons readily react with various chemicals near the earth's surface, producing acidic intermediates which cause acid precipitation