informal lines of communication in an organization are called the

Propagation of EM Waves in Atmosphere - In an Earth environment, electromagnetic waves propagate in ways that depend not only on their own properties but also on those of the environment itself. Since the various methods of propagation depend largely on frequency therefore the complete electromagne..

) use a similar mechanism. In the case of intercontinental telecommunication, two or more satellites are linked together. High frequency radio and submarine cable systems have been widely used for long- distance overseas telecommunications. The high frequency band from 3 MHz to 30 MHz has provided ..

Disease Mode of Transmission Symptom Prevention Control Malaria Caused by protozoan plasmodium through the bite of the female anopheles mosquito High fever, rigorous which is repeated on or 4th day Prevent mosquitoes from biting and prevent them from breeding A quinine derivativ..

Cloning of Organisms - Two or more individuals with identical genetic make up formed from one parent by asexual reproduction are called clones. For example, daughter plants produced by strawberry runners and whole plants produced by tissue culture are clones. Similarly, the indi..

Introduction - Organic chemistry is that branch of chemistry which deals with the study of compounds of carbon with hydrogen (hydrocarbons), and their derivatives. Presently about five million organic compounds are known. Since the synthesis of urea from ammonium thiocyanate, ma..

Unfolding the mysteries of the dark and silent space with no known boundaries has always been a dream of the human race. The desires of man has ultimately been accomplished through the exploration of space using various space launching vehicles, space probes and satellites. Contributions made by US..

Living organisms do not survive indefinitely. Every organism dies after attaining a certain age or due to predation, disease, accident or other factors. The reduction in the number of individuals of a population as a result of death, is restored by the addition of new individual..

Mutations are sudden heritable changes brought about by the composition of a gene or a chromosome. Accordingly, it can be a gene mutation or a chromosomal mutation. Sometimes, there may be just a change in the chromosome number causing a variation. It is called as ploidy or genomatic mut..

Introduction - One of the main ideas in the modified cell principle is that new cells arise from pre-existing cells (Omnis cellula e cellula). Every new cell formed must inherit not only the nucleus which contains the genetic information, but also should inherit the cell organelles that a..

Organic chemistry is that branch of chemistry which deals with the study of compounds of carbon with hydrogen (hydrocarbons), and their derivatives. Presently about five million organic compounds are known. Since the synthesis of urea from ammonium thiocyanate, many organic..