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General Ecology. Concepts In Scientific Writing. Upper and Lower Extremity Biomechanics. Have no Fear of Zoology.

Human Anatomy Synopsis: Axilla-Upper limb. Cognitive Science of Religion and Belief Systems. A Concise Guide to Neurodiversity. Biological Signal Analysis.

Nature and Limits of Human Knowledge. Learn Calculus 2 on Your Mobile Device. Large Scale Data Handling in Biology. A Wetter Look at Climate Change. Laccases and their applications. Molecular Conformations. Measurements of Body Composition by Bioimpedance. Sapropelic Coals. Kinetics for Bioscientist. The importance of this natural science lies in the fact that it explains how life develops on earth, its origin, evolution and even its possible death.

It is also in charge of studying the natural laws that govern life and how to improve it, collaborating with branches such as ecology, medicine or chemistry. Its theoretical principles feed many other important disciplines. Some branches of biology are: microbiology , biotechnology , marine biology , zoology , botany , genetics , among others. Biology is not a totally independent science, since it also feeds on other elementary sciences such as mathematics, physics and chemistry, mainly.

Its study is based on the scientific method. It explains the development of living organisms in the following way: Through a metabolic process, the internal condition of organisms is maintained in equilibrium, due to different chemical reactions of nutrition and waste.

Likewise, there is a relationship with the environment, reacting to its stimuli. Thanks to biology, crucial discoveries have been made in the history of mankind, such as the case of penicillin and vaccines, which have saved so many lives to date. Also, the future seems to advance thanks to molecular biology that contributes to the genetic modification of food.

For all these reasons and many more you should take a look at our collection of free biology books in PDF format. We know that you are passionate about this science that is indispensable to continue walking on this planet and, consequently, we wanted you to increase your knowledge about it. Animal biology is the science that deals with the study of what is called the Kingdom Animalia. This kingdom comprises all multicellular organisms.

And which take energy through the digestion of food and also contain cells that are organized into tissues. This is different from plants, which produce their nutrients from inorganic substances through the process of photosynthesis. Animals actively provide themselves with food. And they proceed to digest it in their internal system. In animal biology, animal tissues are made up of different cells, which are joined together.

Likewise, the extracellular matrix is formed through characteristic junctions. Botany is a part of biology, which is the science that studies all living organisms. Core botany studies plants, fungi and algae in their composition, functions, development, location, adaptations, etc. The father of botany was Theophrastus , a disciple of Aristotle , who in the 4th century B.

Few advances were made in the following centuries. Perhaps the most outstanding figure in the field of botany is Carl Linnaeus , an eminent Swedish scientist of the 18th century who devoted most of his life to studying and classifying plants and animals. Cell biology is the science that studies the properties, characteristics, evolution, life cycle and interaction of the cell with its environment. Cell biology is also known as cellular biochemistry.

Cell biology studies derive from previous disciplines such as cytology the branch of biology that studies cells and histology the discipline that studies organic tissues. Cell biology is essential for the quality of life of human beings. It also helps to propose therapeutic alternatives to improve the repair processes of human tissues and organs, as well as to combat agents that cause severe disorders in living organisms, such as those that occur when bacteria or viruses appear.

Ecology is the science that studies the relationship between living organisms and the environment they inhabit. The definition of ecology is simple but the object of its study is very complex. It was Ernst Haeckel , a German scientist, who created the term ecology in in order to designate a name for the science that studies the relationship between living organisms and the environment. In particular, it studies how the environment influences their distribution, quantity, biodiversity, behavior, the interactions between different species and the modifications they can cause in the environment.

Its levels of study are at the level of organisms, populations and communities of populations that make up ecosystems and the biosphere in general. Environmental biology is a science that studies the possible solution to environmental problems and fundamentally requires a broad knowledge and understanding of the basic physical, chemical and biological processes that occur in nature, for which it is necessary to have qualified personnel to face this problem that integrates almost all branches of knowledge and that should converge in an effort to achieve an adequate relationship between humans and their environment.

Environmental problems are analyzed from a broad biological perspective, with a comprehensive vision of the components of the environment, in such a way that environmental policies can be formulated based on research processes. The life sciences have undergone an extraordinary development in recent decades, which has led to a great diversification of the fields of study. Specifically, environmental biology studies the relationship of biological systems organisms, species, ecosystems with their environment.

Genetics is a branch of biology that studies how hereditary traits are transmitted from generation to generation. Genes are the units of information used by organisms to transfer characteristics to their offspring. The gene contains encoded instructions for synthesizing all the proteins of an organism.

These proteins are the ones that will eventually give rise to all the characteristics of an individual phenotype. Genetics takes on special relevance when studying the transmission of diseases. In the same way that eye color is inherited from parents to children, there are also diseases that can be transmitted to offspring, in this case we speak of genetic or hereditary diseases.