Biology is the science of life in all its manifestations. It emerged from the natural sciences in the nineteenth century, when scientists began to notice that living organisms have some common characteristics. However, the origins of biology can be found in ancient Greece, Rome, India and China. Aristotle in the IV century BC for the first time tried to streamline knowledge about nature, highlighting in it 4 levels: the inorganic world, plants, animals, people.

The biologist is engaged in research on the plant and animal world of the Earth. He studies all aspects of the life of the living organisms of the Earth, their structure, growth, development, origin, evolution and distribution throughout the planet. It classifies and describes living beings, studies the interaction of species with each other. The activity of this scientist depends on his specialization. Botanists study the plant world, zoologists study animals, anatomists and physiologists study the human body, microbiologists study single-celled organisms, and these are not all directions. In addition, he should have knowledge of chemistry, physics, ecology, medicine, as well as basic knowledge of the Latin language.

Most often, the biologist's working day is spent indoors: in the laboratory, clinic, at work. He collects the necessary materials, substances and samples of materials. Applying various kinds of devices and equipment, conducts experiments and studies, the results of which will be applied in a particular industry. In addition to laboratory work, work in natural conditions and business trips to the growing areas of certain plant species and animal habitats are possible. Sometimes it can be difficult to access areas with unusual natural conditions.