Florida Barber License Practice Test

Which of the following is the basic unit of structure and function in all living things?

1. Atoms

2. Molecules

3. Cells

4. Tissues

The correct answer is: Cells

The basic unit of structure and function in all living things is the cell. Cells are the smallest units that can carry out all the processes necessary for life. They are often referred to as the building blocks of life because they form the organizational foundation for all biological organisms. Each cell is capable of performing various functions, including energy production, waste management, and reproduction. Atoms and molecules are vital components of cells, but they do not constitute living organisms on their own. Atoms combine to form molecules, which in turn come together to create cells. Tissues are groups of similar cells that work together to perform a specific function, but they are a higher level of organization compared to cells. Therefore, cells are the fundamental units because they encompass all life functions required for an organism to thrive.