811: Which one of the following agricultural practices is eco-friendly ?
(a) Organic farming
(b) Shifting cultivation
(c) Cultivation of high-yielding varieties
(d) Growing plants in glass-houses
812: The new series of Wholesale Price Index (WPI) released by the Government of India is with reference to the base prices of
(a) 1981-82
(b) 1990-91
(c) 1993-94
(d) 1994-95
813: Which one of the following terms describes not only the physical space occupied by an organism, but also its functional role in the community of organisms?
(a) Ecotone
(b) Ecological niche
(c) Habitat
(d) Home range
814: In which one of the following States are Namchik Namphuk Coalfields located?
(a) Manipur
(b) Mizoram
(c) Meghalaya
(d) Arunachal Pradesh
815: Which one of the following is the continent with the highest mean elevation in the world ?
(a) Antarctica
(b) North America
(c) Asia
(d) South America