Our planet is rich in living organisms.Therefore, for a long time there was a problem taking them into account.For this purpose there systematics.It is a science that deals with the study and classification of all flora and fauna.Systematics animal is built on a system of drawing up a description of all members of this kingdom, including extinct.This system is constantly being updated.
new data, which are used for classification, allow you to create new classes of animals.One only has about a million insect species.Grouping of animals allows to trace their historical development, that is, phylogeny.
Systematics of animals shows the evolution of the animal world.On the basis of the data it is possible to say that the simpler forms of animals are replaced by more complex that adapt to new environmental conditions.
process of evolution can not be restored.Therefore, systematics animals can partially trace the development of the animal world.
Any group of animals is divided into smaller subgroups.Systematics is engaged in the delineation of the animals, their distribution by groups in the correct sequence.This process involves three stages.
first step is to describe the groups and the distribution of her maternity leave.Especially this level is important for those groups that are poorly understood or very numerous.These include many groups of insects.
second step is to find connections between the separate groups, which can be attributed to a high rank.In this study the morphological, embryological similarity that indicate the relationships between them.This step makes it possible to see how the animals changed during evolution.
The third stage involves the study of the links between certain types.Here is a comparison at the population level.It is usually carried out in a well-studied groups.At the same time find out why a particular type so diverse.
Systematics of animals gives a complete picture of the rich fauna of the planet.Without this science can not be traced with precision the entire course of evolution.It would not be reasonable database, but only a chaotic information.
subject of taxonomy is a taxon.Taxa - a group of populations that occupy a certain place in the classification system.
each taxon has two categories of signs.The first category is called typological.It is based on only the morphological features.That is, each type has its own structure or a specific type.This is what determines its place in the classification system.This concept has been successfully used for the study and systematization paleontological finds.
second category - biological.For living organisms, it is more suitable.Here preference criterion crossing.Private views are reproductively isolated from other species.
The variety of living organisms makes it difficult to correct classification.Is not always possible to accurately determine whether the selected animals a separate species or just a genetically modified individual characteristic of the territory.Moreover, some species can still be changed under the influence of the external environment.
But, nevertheless, the importance of taxonomy of animals is huge.It gives each type its name in Latin, which excludes confusion in the case of vulgar names.
Today systematics undergoing a new period of development.Use mathematical methods, computer programs, analysis of DNA and many other developing science that allow a better understanding of the rich fauna of the planet.
