* All cells are enclosed by a membrane. This membrane acts as a barrier, controlling what enters and exits the cell.

* All cells contain DNA. This genetic material carries the instructions for the cell's functions.

* All cells have ribosomes. These are the sites of protein synthesis, essential for all cellular processes.

* All cells carry out basic life functions. This includes metabolism, reproduction, and response to stimuli.

Beyond these core features, cells also share some common characteristics:

* They are all incredibly small. This allows for a large surface area to volume ratio, facilitating efficient nutrient uptake and waste removal.

* They are highly organized. Cellular components have specific roles and work together in a coordinated way.

* They are dynamic. Cells are constantly changing, responding to their environment and adapting to changing conditions.

It's important to note that while all cells share these fundamental features, they can be incredibly diverse. Cells can vary greatly in shape, size, and function, depending on their role in an organism.