In this figure , the interbreeding populations are represented by colored blocks. Variation can form a circle by bending in front of Klein. In nature some populations are observed where closely related populations are capable of interbreeding but there are at least two marginal populations which are incapable of reproduction within themselves. In biology, these species are called ring species . These species , which are genetically related even though they are incapable of reproduction , often live in the same area and form a circle. Chakra species are very important for two reasons: - 1) Chakra species demonstrate what can happen if genetic mutations occur in a population , thus giving important evidence for biological evolution. 2) What happened between the long extinct population and the present living population , the chakra species shows in the living population. How the evolution of a population from the past to the present can be observed with one's own eyes in a population rich in chakra species. Chakra species also take on a new form of "species problem". The questions that biologists face when naming a species and dividing an animal group into species are called "species problems". The difference between the two distinct species with a cyclic species is the coexistence of the populations - if multiple intergrouped populations within the cyclones become extinct and destroy the reproductive relationship between the populations , a cyclic species will appear as two distinct species. The power of interbreeding can in no way be called a transitive relation in mathematical terms - if "a" can reproduce with "b" and "b" can reproduce with "c" , then "a" can reproduce with "c" There is no guarantee that he will be able to reproduce. The chakra species is a remarkable exception to mathematical transcendence. [1] Image Interpretation A color refers to a population , and all populations differ according to the Kline (a slight change in the phenotype of animals living in that environment due to the gradual change in the natural environment). Similar variations can occur in straight lines like A (as it occurs from the bottom of the mountain to the summit) and can also occur in curves like B (for example , around the seashore). Adjacent populations are capable of interbreeding in cases where the kline is bent , but in cases like C , when the beginning and end of the kline come close , the growing gap between the populations increases so much that interbreeding becomes impossible. The interbreeding populations of this circle were then collectively called chakra species.