1716: Which of the following statements is/are correct?
1. Viruses lack enzymes necessary for the generation of energy.
2. Viruses can be cultured in any synthetic medium.
3. Viruses are transmitted from one organism to another by biological vectors only.
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
1717: The average height of 2 students in a class is 115 cm. Ten more students with an average height of 130 cm join them. Therefore, the average height of the group of students now becomes:
(a) 110 cm
(b) 120 cm
(c) 130 cm
(d) 140 cm
1718: In the case of a Test-tube baby
(a) fertilization takes place inside the test-tube
(b) development of the baby taken place inside the test-tube
(c) fertilization takes place outside the mother's body
(d) unfertilized egg develops inside the test-tube
1719: Recently Uttar Pradesh and Madhya Pradesh governments signed a Memorandum of Understanding for the linking of two rivers as a link project. Which are these two rivers?
(a) Betwa and Chambal
(b) Betwa and Ken
(c) Chambal and Son
(d) Ken and Narmada
1720: Consider the following statements:
1. India ranks first in the world in fruit production.
2. India ranks second in the world in the export of tobacco.
Which of these statements is/are correct?
(a) Only 1
(b) Only 2
(c) Both 1 and 2
(d) Neither 1 nor 2