21: Bhakti Cult laid emphasis on:
(a) Idol worship
(b) Universal brotherhood
(c) Devotion to God
(d) None of these
22: Why camphor disappears when kept on a plate?
(a) It sublimes
(b) It reacts with the metal of the container
(c) It reacts with the gases of the air
(d) None of the above
23: In the given figure, the site of the Tehri dam has been labelled as
(a) A
(b) B
(c) C
(d) D
24: The United Nations Framework Convention on Climate Change (UNFCCC) is an international treaty drawn at
(a) United Nations Conference on the Human Environment, Stockholm, 1972
(b) UN Conference on Environment and Development, Rio de Janeiro, 1992
(c) World Summit on Sustainable development, Johannesburg, 2002
(d) UN Climate Change Conference, Copenhagen, 2009
25: With reference to food chains. In ecosystems, consider the following statements:
1. A food chain illustrates the order in which a chain of organisms feed upon each other.
2. Food chains are found within the populations of a species.
3. A food chain illustrates the numbers of each organism which are eaten by others.
Which of the statements given above is/are correct?
(a) 1 only
(b) 1 and 2 only
(c) 1, 2 and 3
(d) None