 अर्गिनासम के नदर कुछ वेर्येशन्स आसी होती है जो के पहुत माइनर्स होती है और ये जो माइनर्वेर्येशन्स के अंदर आती है, these minor variations are actually because of slight genetic variation among different members of species. ये जो स्लाइत वेर्येशन्स है, इस के वेर्येशन्स के अंदर वेर्येवेर्येशन्स होती है, if we are not matching 100% of each other among the members of a species, even if we talk about identical twins, then identical twins never match 100% of each other, because every individual has independent mutations. Although, this mutation rate is very slow, but because every second, every moment, there are variations in the organism, and these variations are gradually accumulating in the organisms due to which differences come in the individuals. Any organism is neither morphologically similar to each other nor genetically resemble each other. Sometime, the members of a population have a lot of variations, and even to detect these variations, we have to use special technology or special type of testing. Now, this variation, which is a continuous variation, it involves multiple genes. And, every gene has its own effect in additive fashion. That is, a character who is controlling more than one gene, in this, every gene has its independent role. Some genes are like this, whose role is more, some genes play a less role. Even some genes are like this, whose impact is positive towards that state, and some are like this, who are playing a negative role. But, the final outcome of all these effects is combined with a positive outcome or a negative outcome. Now, different types of traits are present in the individual, and the variability in each trait varies. Some traits are like this, who are highly variable, but some traits are like this, in which the variability is less, in which the degree of variability is less. Now, we have also seen that in some species, the individual variation is much more, but in this case, some species are like this, in which the individual variations are very less. Now, how will we know that in which species the variability is more, and in which species the variability is less, then why is it less? To take the answer for this, there is a lot of detailed knowledge and background study. After that, we can give the answer to this question. Many tax reformists have under-related these individual variations, and due to these minor variations, due to these individual variations, they had declared that many species belonging to the same species, and considered different species. For example, if we talk about the male genus Melania, which is a fresh water or brackish water species, its identification base was its shell characters. Its shell characters were considered in different species, but when the revision of this genus was done, it was found that at least 114 species were like this, which were kept in different species only because of this, because they had individual variations. Basically, they were not different species, but because they had individual variability, they considered these species in different species while using tax reformists. Because when they identified these species, they did not have detailed information. Later, when detailed information was available, they found out that these species were not different species, because of individual variability, they were mistakenly kept in different species.