The Structural and Functional Unit of All Living Organisms Is

Question

The structural and functional unit of all living organisms is the
A) cell.
B) plasma membrane.
C) organelle.
D) ribosome.
E) organ.

Accepted Answer

The cell is the basic and fundamental unit of life. It is the smallest unit of an organism that is capable of performing all the essential functions of life, such as metabolism, growth, reproduction, and responding to stimuli. All living organisms, including animals, plants, fungi, and bacteria, are made up of one or more cells. The plasma membrane, organelles, and ribosomes are important components and structures within the cell but do not represent the entirety of the organism itself. Organs are composed of multiple types of tissues and are not universal across all living organisms in the same way that cells are.