3631: Human activities in the recent past have caused the increased concentration of carbon dioxide in the atmosphere, but a lot of it does not remain in the lower atmosphere because of
1. Its escape into the outer strato-sphere.
2. The photosynthesis by phyto-plankton in the oceans.
3. The trapping of air in the polar ice caps
Which of the statements given above is/are correct?
(a) 1 and 2
(b) 2 only
(c) 2 and 3 only
(d) 3 only
3632: Recombinant DNA technology (Genetic Engineering) allows genes to be transferred
1. across different species of plants
2. from animals to plants
3. from micro organisms to higher organisms
Select the correct answer using the codes given below.
(a) 1 only
(b) 2 and 3 only
(c) 1 and 3 only
(d) 1, 2 and 3
3633: When a CD (Compact Disc used in audio and video systems) is seen in sunlight, rainbow like colours are seen. This can be explained on the basis of the phenomenon of
(a) reflection and diffraction
(b) reflection and transmission
(c) diffraction and transmission
(d) refraction, diffraction and transmission
3634: Match List-I (Biosphere Reserves) with List-II (States) and select the correct answer using the codes given below the Lists:
List-I List-II
(Biosphere Reserves) (States)
A. Similipal 1. Sikkim
B. Dehong 2. Uttaranchal Deband
C. Nokrek 3. Arunachal Pradesh
D. Kanchenjunga 4. Orissa
5. Meghalaya
Codes :
A B C D
(a) 1 3 5 4
(b) 4 5 2 1
(c) 1 5 2 4
(d) 4 3 5 1
3635: A man coming down on a lift leaves a ball from his hand. The ball will:
(a) Go up
(b) Fall down
(c) Remain stationary with respect to man
(d) Oscillate up and down