256 : The proportion of R.B.C. and W.B.C. in human body is ?
Ans : 25.00069444444444
257 : Insects which feed on waste material such as dead bodies; debris etc are called?
Ans : Scavengers
258 : Quinine; an alkaloid; extracted from the tree Cinchona Officianalis; is used to cure which disease?
Ans : Malaria
259 : Who is the inventor of Camera?
Ans : Zeiss
260 : Father of Biology ?
Ans : Aristotle
261 : The pesticide used in foundations of buildings for preventing; termite attack is?
Ans : Aldrin
262 : Which organ of the body is affected by Tuberculosis?
Ans : Lungs
263 : TB vaccine was discovered by ?
Ans : Leon Calmette and Camille Guerin (1992)
264 : Who is the inventor of Electric Current; Induction of?
Ans : Michael Faraday
265 : Who is the inventor of Nuclear Physics?
Ans : John Crockfort
266 : Who is the inventor of Torpedo?
Ans : Rabert Whitehead
267 : Who is the inventor of Nuclear Fission?
Ans : Otto Hahn
268 : Who is the inventor of Hydrogen?
Ans : Henry Cavendish
269 : Most poisonous bird and the only known poisonous bird in the world is ?
Ans : The Hooded Pitohui from Papua New Guinea
270 : The process by which water diffuses through a semi-permeable membrane from a region of higher concentration of a solution to a region of lower concentration of a solution?
Ans : OSMOSIS
