71: Which bacterial strain, developed from natural isolates by genetic manipulations, can be used for treating oil spills ?
(a) Agrobacterium
(b) Pseudomonas
(c) Nitrosomonas
(d) Clostridium
72: If you travel through the Himalayas, you are likely to see which of the following plants naturally growing there?
1. Oak
2. Rhododendron
3. Sandalwood
Select the correct answer using the code given below.
(a) 1 and 2 only
(b) 3 only
(c) 1 and 3 only
(d) 1, 2 and 3
73: Consider the following statements:
1. The Earth's magnetic field has reversed every few hundred thousand years.
2. When the Earth was created more than 4000 million years ago, there was 54% oxygen and no carbon dioxide.
3. When living organisms originated, they modified the early atmosphere of the Earth.
Which of the statements given above is/are correct?
(a) 1 only
(b) 2 and 3 only
(c) 1 and 3 only
(d) 1, 2 and 3
74: Consider the following statements:
1. India is the only country in the world producing all the five known commercial varieties of Silk.
2. India is the largest producer of sugar in the world.
Which of the following statements given above is/are correct?
(a) 1 only
(b) 2 only
(c) Both 1 and 2
(d) Neither 1 nor 2
75: How many numbers from 0 to 999 are not divisible by either 5 or 7 ?
(A) 313
(B) 686
(C) 341
(D) 786