641: 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
642: In how many different ways can six players be arranged in a line such that two of them, Ajit and Mukherjee, are never together?
(a) 120
(b) 240
(c) 360
(d) 480
643: In the parlance of financial investments, the term 'bear' denotes
(a) An investor who feels that the price of a particular security is going to fall
(b) An investor who expects the price of particular shares to rise
(c) A shareholder or a bondholder who has' an interest in a company, financial or otherwise
(d) Any lender, whether by making a loan or buying a bond
644: In the balanced dietaries for a day of an adult working man, weights of carbohydrate food and total protein food (both superior and inferior) should be in order of
(a) 600 gm and 420 gm respectively
(b) 600 gm and 600 gm respectively
(c) 420 gm and 600 gm respectively
(d) 420 gm and 420 gm respectively
645: The famous dialogue between, Nachiketa and Yama is mentioned in the
(a) Chhandogyopanishad
(b) Mundakopanishad
(c) Kathopanishad
(d) Kenopanishad