3146: Which of the following statements is/are correct?
Viruses can infect
1. bacteria
2. fungi
3. plants
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
3147: For India, China, the UK and the USA, which one of the following is the correct sequence of the median age of their populations?
(a) India < China < USA < UK
(b) China < India < UK < USA
(c) China < India < USA < UK
(d) India < China < UK < USA
3148: Scratching eases itching because
(a) it removes the outer dust in the skin
(b) it kills the germs
(c) it stimulates certain nerves which direct the brain to increase the production of antihistaminic chemicals
(d) it suppresses the production of enzymes which cause itching
3149: Consider the following statements in respect of financial emergency under Article 360 of the Constitution of India:
1. A Proclamation of financial emergency issued shall cease to operate at the expiration of two months, unless before the expiration of that period it has been approved by the resolution of both houses of Parliament.
2. If any proclamation of financial emergency is in operation, it is competent for the president of India to issue directions for the reduction of salaries and allowances of all or any class of persons serving in connection with the affairs of the Union but excluding the Judges of the Supreme Court and the High Courts.
Which of the statements given above is/are correct ?
(a) 1 only
(b) 2 only
(c) Both 1 and 2
(d) Neither 1 nor 2
3150: Variations in the length of daytime and night time from season to season are due to
(a) the earth's rotation on its axis
(b) the earth's revolution round the sun in an elliptical manner
(c) latitudinal position of the place
(d) revolution of the earth on a tilted axis