301. Particle clouds from where stars are formed are known as Stellar nurseries.
302. The SI standard of time is based on the frequency of light emitted by Kr86.
303. All of the following substances are crystalline except Plastic.
304. In the electromagnetic spectrum, infrared light has the largest wavelength.
305. The quantity of fresh air required for a man is 20 minutes.
306. Water vapor turns into clouds in the atmosphere when the dew point is reached.
307. The areas around the North and South poles within the Polar circles are called the Frigid Zone.
308. Vitamin B12 is synthesized in the body by intestinal bacteria.
309. Muscle fatigue is caused by the accumulation of Lactic acid.
310. The basic purposes of dams include storage of water in a large reservoir, generation of electricity, and control of floods.
311. The protein content in wheat is approximately 12%.
312. There are approximately 100 billion galaxies.
313. The variety of coal in which the deposit contains recognizable traces of the original plant material is Peat.
314. The addictive drug in tobacco is Nicotine.
315. Fatal degenerative lung disease caused by particulate asbestos is referred to as Asbestosis.
316. The largest of the white blood cells are Monocytes.
317. ‘Black holes’ refers to collapsing objects of high density.
318. The nearest star to our sun is Proxima Centauri.
319. Thomas Edison is credited with inventing the bulb.
320. A female mosquito of the Aedes genus is the cause of Dengue fever.