The Latin word formica means ant. The name formic acid is derived from this Latin word because
Options: this acid, in ancient times, was used to eliminate ant-hills, this corrosive acid is secreted by ants to drive away their enemies, this acid was first obtained by the distillation of ants, ants are attracted by the odour of this acid
Exposure to sunlight helps a person improve his health because
Options: the infrared light kills bacteria in the body, resistance power increases, the pigment cells in the skin get stimulated and produce a healthy tan, the ultraviolet rays convert skin oil into Vitamin D
The land-sea distribution or the positions of the world's continents and major oceans influences
Options: the major pressure belts that develop from the general circulation of the atmosphere, the development of the mid-latitude cyclonic depressions, at the convergence zone between polar and subtropical air masses, both (a) and (b), None of the above
Which of the following pairs of country and the purpose for which U.N. Peace Keeping Force is maintained is correctly is correctly matched?
Options: Cyprus - to maintain peace between the two dominant ethnic groups in the country, Mozambique - To supervise a referendum, El Salvador - to deliver humanitarian aid, Lebanon - For supervising a 1992 accord