No. Copper-T which is placed in the uterus prevents pregnancy. It cannot prevent sexually-transmitted diseases. Venereal diseases which are... View Article
Uneven heating of the Earth's surface causes winds. On being heated, the air becomes lighter and rises. As a result, a region of low pressure is... View Article
The undesirable plants that grow along with the crops are called weeds. These weeds, feed on the nutrients provided to the crops and thus reduce... View Article
The tiny projections on the inner surface of the small intestine which help in absorbing the digested food are called villi. These helps to... View Article
The preserved remains of animals or plants or other organisms from the distant past are called fossils. These fossils tell us about many extinct... View Article
Antibiotics are medicines produced by certain micro-organisms to kill other disease-causing micro-organisms. Antibiotics are antimicrobial... View Article
Answer: (ii) Streptomycin Antibiotics are antimicrobial drugs obtained from other organisms such as moulds, fungus, and soil bacteria to combat... View Article
Answer: A transformer is a device used in the power transmission of electric energy. The transmission current is AC. It is commonly used to... View Article
a) Wavelength: The distance between two consecutive compressions or two consecutive rarefactions is known as the wavelength. Its SI unit is metre... View Article
The live wire carries the current to the appliance. The live wire is also called hot wire. Live wire is brown or red in colour. This is the wire... View Article
Residual volume is always greater than tidal volume. Tidal volume is the volume of air normally inspired or expired in one breath without any... View Article
