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Biology investigates those attributes that characterize individuals as individuals and species as a group, studying their behaviors, their interrelations, their links with the environment and their reproductive habits.

This science seeks to discover, from the analysis of structures and processes, those laws of a general nature that regulate organic functioning.

Many are the biologists who throughout history have left their indelible mark on this science through or thanks to the set of investigations and discoveries that, in one way or another, have managed to mark our past, our present or our future.

This would be the case, for example, of the Scotsman Alexander Fleming who made two important discoveries for humanity. On the one hand, there would be lysozyme that's responsible for functioning as a barrier to infections. And on the other hand, we would have to talk about penicillin, which is a substance of biochemical type that's used in the scientific field to combat all the diseases that originate as a result of the action of various microorganisms.

But we can't ignore the figure of another biologist of great importance in world history. We are referring to the Frenchman Louis Pasteur who stands out specially because we owe him the well-known thermal process of pasteurization, which is the one to which certain liquids, such as milk, are subjected to end the bacteria or molds they may have.

In the same way, this scientist has also passed to the annals of history for having been one of the initiators of what are vaccines against infectious diseases or for having created the rabies vaccine. Discoveries and advances all those who achieved that have earned him to be qualified as the pioneer of modern microbiology.

It's important to keep in mind that biology encompasses various fields of study that are often considered as independent disciplines. It may be mentioned the molecular biology, the molecular genetics, the biochemistry and cell biology, among others.

Beyond the differences, all branches of biology have certain common principles and principles that make science a unit. One of the basic ideas of biology argues that all life forms share the same ancestor. The differences of the present are explained from the theory of evolution. This theory demonstrates why organisms of very different appearance share a large number of processes and characteristics.

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