2551: The formation of ozone hole in the Antarctic region has been a cause of concern. What could be the reason for the formation of this hole?
(a) Increased temperature at polar region due to global warming
(b) Presence of prominent polar front and stratospheric Clouds and inflow of chlorofluorocarbons
(c) Absence of polar front and stratospheric clouds and inflow of methane and chlorofluorocarbons
(d) Presence of prominent tropospheric turbulence and inflow of chlorofluorocarbons
2552: The film The Making of the Mahatma has been directed by
(a) Peter Ustinov
(b) Richard Attenborough
(c) Shyam Benegal
(d) Mira Nair
2553: Which one of the following can one come across if one travels through the Strait of Malacca ?
(a) Java
(b) Singapore
(c) Bali
(d) Brunei
2554: Poison glands of snakes are homologous to
(a) electric organs of fishes
(b) stings of rays
(c) sebaceous glands of mammals
(d) salivary glands of vertebrates
2555: Ice cubes are floating in a glass of water. When the ice cubes melt, the water level in the glass:
(a) Will first increase and then start decreasing
(b) Will first decrease and then start increasing
(c) Will remain unchanged
(d) Will increase