AP BIOLOGY

Detailed explanation-1: -All living things are made of cells; the cell itself is the smallest fundamental unit of structure and function in living organisms.

Detailed explanation-2: -A cell is the smallest independently functioning unit of a living organism. Even bacteria, which are extremely small, independently-living organisms, have a cellular structure. Each bacterium is a single cell.

Detailed explanation-3: -The cell is the smallest structural and functional unit of living organisms, which can exist on its own. Therefore, it is sometimes called the building block of life.

Detailed explanation-4: -The smallest structural and functional unit of an organism is a cell.

Detailed explanation-5: -A cell is the smallest unit that is typically considered alive and is a fundamental unit of life. All living organisms are composed of cells, from just one (unicellular) to many trillions (multicellular). Cell biology is the study of cells, their physiology, structure, and life cycle.