Overview of Biology

All living organisms are composed of cells. A cell is a small, membrane-bound compartment that contains all the chemicals and molecules that help support an organism's life. An understanding of the structure of cells is one of the first steps in comprehending the complex cellular interactions that direct and produce life. Cells can be thought of as building blocks of organisms. Some organisms are composed of a single cell. Others, like ourselves, are composed of …

…organisms. Topics like genetics that are difficult to study in larger organisms because of the time and expense involved in raising them can easily be studied in microorganisms living in petri dishes by the billions. Overall, microorganisms are some of the most important living creatures. Their role as producers and recyclers makes them vital in most ecosystems. A greater understanding of these tiny creatures is vital for the study and preservation of our natural environment.