In Biology, there is a process where all living organisms are classified based on their evolutionary relationships, the term for this classification is known as taxonomy (taxi means arrangement and nomos means method).Carolus Linneaeus a Swedish botanist scientist helped develop what is known as the modern system of classification or binomial system using simple physical characteristics of various organisms to compare and contrast between different species in 1753.

Within the binomial system Linnaeus stated that organisms should be classified with a unique name. This was because plants that were being discovered all throughout Europe at that time had very lengthy, complicated names. So he decided that the first term is the organism’s generic name also known as it’s Genus and the second term is the organism's specific name or species.

                                                                                 Example of binomial system

* The first letter of the Genus is always capitalized while the first letter of the species is in lowercase.

Ever since the development of the binomial system the two terms used in the system genus+species becomes the scientific name of the organism. E.g. Dog is also known as Canis familiaris.

Modern day classification/taxonomy systems have been developed and are more detailed regarding levels of hierarchical organization. Meaning that modern organisms are organized in a system that goes from general to specific so as to reveal more details and patterns within a specific organism. These new formed modern day classification systems are taxonomic (structural and physiological connections between organisms), phylogenic (classification based on genetic connection between organisms) and they are also based on the theory of evolution which was established by Charles Darwin. The newly formed system includes the 7 different levels that each organism falls into which includes - Kingdom, Phylum, Class, Order, Family, Genus and Species. As each group is split into smaller groups, the organisms become more alike.