2561: Which one of the following plants can fix nitrogen from air?
(a) Rice
(b) Wheat
(c) Pea
(d) Maize
2562: According to ancient Indian cosmogonic ideas the sequential order of the cycle of four aeons (Yugas) is
(a) Dvapara, Krita, Treta and Kali
(b) Krita, Dvapara, Treta and Kali
(c) Krita, Treta, Dvapara and Kali
(d) Treta, Dvapara, Kali and Krita
2563: Fuel used in a nuclear reactor is:
(a) Uranium
(b) Heavy water
(c) Barium
(d) Cadmium
2564: Shifting cultivators normally grow:
(a) A single crop which is mainly consumed
(b) The major crop along with cereals
(c) Cash crops along with fodder
(d) Grains, vegetables and tubers in rotation
2565: In India, cluster bean (Guar) is traditionally used as a vegetable or animal feed, but recently the cultivation of this has assumed significance.
Which one of the following statements is correct in this context ?
(a) The oil extracted from seeds is used in the manufacture of biodegradable plastics
(b) The gun made from its seeds is used in the extraction of shale gas
(c) The leaf extract of this plant has the properties of anti-histamines
(d) It is a source of high quality biodiesel