121: What would happen if phytoplankton of an ocean is completely destroyed for some reason?
1. The ocean as a carbon sink would be adversely affected.
2. The food chains in the ocean would be adversely affected.
3. The density of ocean water would drastically decrease.
Select the correct answer using the codes given below :
(a) 1 and 2 only
(b) 2 only
(c) 3 only
(d) 1, 2 and 3
122: Consider the following statements:
1. The Parliament of Russia is called Federal Assembly.
2. The Council of the Federation in the Russian Parliament is the lower house.
3. The name of the upper house in the Russian parliament is State Duma.
Which of the following statements given above is/are correct?
(a) 1 only
(b) 1 and 2
(c) 2 and 3
(d) 1, 2 and 3
123: Among the following cities, which one is at the highest altitude above mean sea level?
(a) Bangalore
(b) Delhi
(c) Jodhpur
(d) Nagpur
124: Three important micronutrients essential for humans are
(a) Copper, zinc and iodine
(b) Zinc, copper and potassium
(c) Nitrogen, molybdenum and iodine
(d) Sulphur, copper and iron
125: Which of the following professional (s) are more likely to run the risk of a permanent change in their cell's DNA ?
I. Researchers using carbon-14 isotope
II. X-ray technician
III. Coal miner
IV. Dyer and Painter
Select the correct answer by using the codes given below :
(a) II alone
(b) I, II and III
(c) I, II and IV
(d) I, III and IV