Isolating mechanisms" available in nature.
Discuss the different “isolating mechanisms" available in nature. The development of differentiation in sympatric populations which are those inhabit the geographical area, will not interbreed even when kept together. Such a situation results due to varied factors which are collectively caused isolating mechanisms. Isolating Mechanisms : The isolating mechanisms may be purely spatial or may involve specific mechanisms covering reproductive isolation, which will operate in sympatric population. Setbbins in his recent book, Processes of Organic Evolution, classified reproductive isolation mechanisms into two types: (a) Prezygotic mechanisms : These prevent contact between species at the time of active reproductive period or else the fertilization is checked even if pollination may be effectively brought about. These may be: (1) Spatial or ecological isolation, (2) Seasonal or temporal isolation, (3)...