Description of a living organism by a biological method.

When using a biological method to describe animals, there are some rules to keep in mind. First of all, it is the order of work. First, we need to examine a specific representative. After that, we highlight certain external features of the body. Not only the body parts of the organism are described, but also their functions. Also, it describes the way the body behaves in certain conditions, the way of reproduction, nutrition, and so on. Sometimes the behavior of an organism is studied under certain environmental conditions.