Competition leads to evolution. Justify your answer. 

Resource availability is one of the major factors to determine the ecological dynamics of population or species. Fluctuation in resource availability can increase or decrease the intencity of resource competition. Resourse availability and competition can also cause the evolutionary changes. The Darwinian theory of ''struggle for existence'' reflects on how essential resource competition is, in shapping the evolution of all organisms when resources are limited. The general prediction based on classical competitive exclusion principle is that if specieses share the same limiting resource they can't co- exist in definitely. Competitively superior will out - compete the weaker ones. In a long enough time the selection pressuer caused by competetion can cause evolutionary changes which is termed as ''Natural Selection'' by Darwin.