336: Which one of the following pairs is not correctly marched?
(a) Seikan Rail Tunnel : China
(b) Appalachian Trail : USA
(c) Petronas Towers : Malaysia
(d) Rogun Dam : Tajikistan
337: Which one of the following plants is effective in reducing water pollution and is also useful for producing bio gas ?
(a) Eucalyptus
(b) Water hyacinth
(c) Salvinio
(d) Lotus
338: Who was the founder of the Servants of India Society?
(a) G. K. Gokhale
(b) K. M. Roy
(c) M. K. Gandhi
(d) B. G. Tilak
339: Which one of the following is the best description of the term 'ecosystem'?
(a) A community of organisms interacting with one another.
(b) That part of the Earth which is inhabited by living organisms.
(c) A community of organisms together with the environment in which they live
(d) The flora and fauna of a geographical area
340: Which one of the following polymers is widely used for making bullet proof material ?
(a) Polyvinyl chloride
(b) Polyamides
(c) Polyethylene
(d) Polycarbonates