2551: Some species of plants are insectivorous. Why?
(a) Their growth in shady and dark places does not allow them to undertake sufficient photosynthesis and thus they depend on insects for nutrition
(b) They are adapted to growing nitrogen deficient soils and thus depend on insects for sufficient nitrogenous nutrition
(c) They cannot synthesize certain vitamins themselves and depend on the insects digested by them
(d) They have remained in that particular stage of evolution as living fossils, a link between autotrophs and heterotrophs
2553: In a business concern, there are four functions, namely, Production (PR), Finance (FN), Personnel (PS) and Marketing (MK). The Customer (C) may also play a role in the prosperity of the concern. Match List I with List II and select the correct answer using the codes given below the Lists :
Codes:
(a) I-D, II-C, III-A, IV-B
(b) I-E, II-D, III-A, IV-B
(c) I-D, II-C, III-B, IV-E
(d) I-E, II-D, III-B, IV-A
2554: The formation of ozone hole in the Antarctic region has been a cause of concern. What could be the reason for the formation of this hole?
(a) Increased temperature at polar region due to global warming
(b) Presence of prominent polar front and stratospheric Clouds and inflow of chlorofluorocarbons
(c) Absence of polar front and stratospheric clouds and inflow of methane and chlorofluorocarbons
(d) Presence of prominent tropospheric turbulence and inflow of chlorofluorocarbons