151: 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
152: As per the 1991 Census, the average size of households in terms of number of persons per household in respect of the given states follows the sequence (highest first, lowest last).
(a) Haryana, Uttar Pradesh, Kerala, Tamil Nadu
(b) Uttar Pradesh, West Bengal, Gujarat, Kerala
(c) Gujarat, Haryana, Uttar Pradesh, West Bengal
(d) Uttar Pradesh, West Bengal, Tamil Nadu, Kerala