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The word biology is formed by two Greek terms: bios ("life") and logos ('study'). It is one of the natural sciences with the object of study is the origin, evolution and properties of human beings alive.
Biology studied the characteristics and behaviors of individual organizations, either the whole of the species as well as the reproduction of human beings living and the interactions between them and the environment. This science analyzes the structure and functional Dynamics common to all human beings alive, whose objective is to establish the general laws which regent organic life.
It is important to take into account that the biology includes several fields of study which, very often, are considered independent disciplines. For example, molecular biology, biochemistry and molecular genetics are responsible for the study on Atomic and molecular scale. On the other hand, cell biology realizes his studies of cellular perspective.
In respect the physiology, Anatomy and histology, they study at the cluster level, while the developmental biology analysis the development of an individual organism. Genetics research on the functioning of the inheritance of parents on their offspring and ethology, in turn, focuses on the behavior of groups.
Whole populations are observed by the genetics of populations and systematic genetics reflects on the lineages between species. Ecology and evolutionary biology care populations interdependent and their habitats. Then, it is appropriate to mention the Astrobiology, which is studying the possibility of life outside the Earth.