In the case of genetic variation, the genes of the organisms or the individuals changes within a population. Gene alleles define distinct traits that can be transferred on from parents to offsprings. Gene variation is very necessary for the process of natural selection. The genetic variation that occurs in a population can happen by chance, but in the case of natural selection it does not.
High-impact journals are those considered to be highly influential in their respective fields. The impact factor of journal provides quantitative assessment tool for grading, evaluating, sorting and comparing journals of similar kind. It reflects the average number of citations to recent articles published in science and social science journals in a particular year or period, and is frequently used as a proxy for the relative importance of a journal within its field. It is first devised by Eugene Garfield, the founder of the Institute for Scientific Information.The impact factor of a journal is evaluated by dividing the number of current year citations to the source items published in that journal during the previous two years.
Last date updated on January, 2021