All living organisms are made up of cells, which are the basic structural and functional units of life. Cells contain the necessary biological components to sustain life. Organisms can be single-celled or multicellular and complex, like humans.
3. Basic information of cell biology
• All living organisms on Earth are divided
into cells. The main concept of cell theory is
that cells are the basic structural unit for all
organisms. Cells are small compartments that
hold the biological equipment necessary to
keep an organism alive and successful. Living
things may be single-celled or they may be
very complex such as a human being.