Life on the Earth is composed by a myriad of components, each representing a clear sign of the power of nature and the infinity of forms of representation, in addition to every form of life, clearly shows the result of stages of changes that have happened in history and that have resulted the life as we know it today. So before the existence of so many forms of life and diverse process through which passed the living beings, man has developed a science that conducts studies to have a better understanding about life on Earth and perhaps science is biology, which belongs to the Group of natural sciences, taking as object of study all living beings and all features that accompany them. According to the above biology, in the development of its object of study which are all forms of living beings, must also work with various processes that accompany the existence of living beings, i.e. the origin, as you have been the evolution and the various processes, also of anointings that occur in the normal operation of living beings and their properties, such as birth, nutrition, different changes that are generated with the growth and development of the body of living beings, the reproduction, different diseases and the end of life and factors that can cause this. It is good to know that biology studies both to living beings in the characteristics and behavior of a single be’s study, as an individual object, such as the study of these patterns but from a more general perspective, i.e. a species as a whole; so you must add another point for the field of study of biology, speaking of a species in general, and such object is research on the relationships that normally handle the components of a society and the environment in which such relations are given. The above can be said that deals structure that make up human beings and dynamics handled in the development of his life and after making a study about these points, passes biology Biology from a general perspective of their activities, to perform various laws about organic life and principles that explain it. As biology can be understood has a field of study muya grande, because dealing with various forms of life that may occur in the world requires to cover a myriad of organisms, ranging from life at the atomic or molecular level to conformations of societies or species of large number of components as the insects would be it, which is the species with the greatest number of components or various human societies, in such a way to give accomplished implementation of the purposes of biology, this must be spread in different disciplines or branches of study, such as molecular biology and astrobiology..