2016: 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
2017: If water contracts on freezing, which of the following would happen?
(a) Icebergs will completely float on the surface of water
(b) Ice would become more dense
(c) Lakes would freeze from top to bottom
(d) Rocks will crack due to freezing or internal water
2018: Other than India and China, which of the following groups of countries border Myanmar ?
(a) Bangladesh, Thailand and Vietnam
(b) Thailand, Laos and Bangladesh
(c) Cambodia, Laos and Malaysia
(d) Thailand, Vietnam and Malaysia
2019: Eco mark is given to the Indian products that are
(a) pure and unadulterated
(b) rich in proteins
(c) environment friendly
(d) economically viable
2020: The beginning of urbanisation of the Ganges from the 6th century was mainly attributed to:
(a) Fertility of soil
(b) Trade improvement
(c) Population growth
(d) None of the above