2386: Which one of the following approaches comes under the category of biotechnology?
(a) Use of living organisms or substances obtained from them in industrial processes
(b) Modernizing the commercial industries to produce products for use in biological research
(c) Use of modern technology to investigate biological disorders
(d) Use of industrial technology to increase the biosphere
2387: When ten persons shake hands with one another, in how many ways is it possible ?
(A) 45
(B) 20
(C) 25
(D) 40
2388: Which of the following is a dance - drama ?
(a) Kathakali
(b) Bharatnatyam
(c) Odissi
(d) Manipuri
2389: The Ajanta Caves were built during the period of:
(a) Guptas
(b) Kushans
(c) Mauryas
(d) Chalukyas
2390: 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