The biological classification of living organisms is considered as the first classification of living things on the planet Earth. It is a system that involves grouping together all the different types of living things under one group. Under this classification, there are about 400 families of living things. These families can further be broken down into to about 100 Families with a further division into subsets. The classification also includes classification of living things according to their mode of reproduction.
This classification system has its basis in the binomial nomenclature which is widely used by scientists and educators all over the world for classifying and categorizing various living things. Binomial nomenclature includes two basic types of system. One type is based on the characters on the card. The other type of classification system puts greater emphasis on the arrangement of the characters on the card.
Both the binomial nomenclature and the classification according to the arrangement of characters can be applied in biological classification organisms. The former uses characters that are found on the whole organism while the latter applies only to those characters that are present in every part of the organism. This means that in biological classification of living organisms, only the characters that are usually found together should be counted while ignoring other characters that are not really essential for the organism.
It is important to note that there are three main categories of living organisms. They are the unencumbered kingdom, the reproductive kingdom, and the unicellular or plant kingdoms. Unducumbered kingdom refers to all the organisms that have no external parasites or no means by which they can reproduce. These include all the microorganisms that belong to the kingdom Protista. The reproductive kingdom contains all the organisms that are part of a living cell. And the unicellular or plant kingdom includes all those organisms that belong to the kingdom Embryophytes.
The binomial nomenclature is used in the classification of living organisms based on the arrangement of characters on the organism. The arrangement is called the taxonomy. This classification is also called the cladogram. The basis for the binomial nomenclature is the number of similar organisms that are found in the same genus or family. In cladograms, the number of similar organisms is analyzed using similarities among the members of a group of organisms.
A number of different methods are employed in combination with other procedures in determining the relationship among organisms and their arrangement in nature. One of these methods is the molecular biology. Another method employed is the biological taxonomy. The third method used is the comparative analysis of species. In order to classify organisms properly it is necessary to have at least one example of each organism in nature.
Some examples of biological classification notes are mentioned below. The description of the staminifera-chlorophyll symbiont of the green algae, Chlamydomonas, is given separately and is very similar to that of the other chlorelliums. The description of the eukaryote and plastid-plant communities of the prokaryotic and the eukaryplankton communities is very similar in both cases. The description of the eukaryote and the symbiotic algae, Chlorella vulgaris, is very similar in both cases also.
In order to classify living organisms properly it is important to study at length in the literature. The literature in this case would comprise the description of the entire life history of the object. It should be remembered that the literature on natural population, reproductive processes and anatomy are not included in this list. There are many other such important subjects in the biology which are dealt with in separate textbooks. But the above five-kingdom classification is the best one that can be used for classifying living organisms.