221. Earthquakes occur most frequently at plate boundaries.
222. Anthracite is a type of hard coal.
223. Mercury and bromine are the only two elements on the periodic table that are liquid at room temperature.
224. Immunity is the body’s natural or acquired ability to resist certain diseases.
225. Dead red blood corpuscles are stored in the spleen.
226. Granite is an igneous rock.
227. The uvula is located in the throat.
228. Giraffes have no vocal cords.
229. Being myopic means you have a problem seeing distant objects clearly.
230. The hormone that increases the rate of heart beat and blood pressure after shock in a person is adrenalin.
231. Biopsy is done on tissues taken from a living body.
232. Neptune is the planet which revolves slowly around the Sun.
233. Animals use nitrogen in the form of nitrates.
234. Carolus Linnaeus is known as the father of taxonomy.
235. William Harvey discovered blood circulation.
236. The gas used in an air conditioner is Freon.
237. Graham’s Law states that the rate of the effusion of a gas is inversely proportional to the square root of its density.
238. Black soil is also called Regur soil.
239. The heaviest man-made element found so far is Ununoctium.
240. Silver is the pure conductor of electricity.