Non-living things are not composed of cells, as cells are the smallest unit of life. Small organisms such as bacteria and protists are only composed of a single cell, but are alive. More »

Some of the characteristics of living things are the ability to reproduce, active response and adaptation to the surrounding environment, cell composition and growth and development. Life forms have to exhibit all the ch... More »

Non-living things in the desert are water, air, energy, substrate and chemical constituents, also known as nutrients. The non-living elements combined with the living organisms make up the desert ecosystem. More »

Cell theory is the scientific theory that describes the properties of cells, primarily that the cell is the basic unit of life, and all living things are made of cells and all cells come from pre-existing cells. Modern c... More »

The three fundamental propositions of classical cell theory are that the cell is the most basic unit of life, all life is made up of cells and cells are formed only by other cells. Each tenet of this theory is important ... More »

Cell theory states that all living organisms are made up of cells and that the cell is the basic unit of life. It also states that all cells arise from preexisting cells. The formulation of this theory is not attributed ... More »

www.reference.com Science Biology Cells

Cells are considered the smallest unit of life because they are the smallest components in living things, and some organisms, such as bacteria, are made up of single cells. In addition, each part of the animal body, incl... More »