There are actually not one, but two different types of cells: prokaryotic and eukaryotic.
A prokaryotic cell is simpler than the other type of animal cell, and is therefore smaller. It lacks a nucleus and other characteristics that are usually present in eukaryotic cells. Bacteria and archaea are two examples of prokaryotic cells.
As afore mentioned, a prokaryotic cell has a simpler architecture structure than its counterpart, with flagella and pili protruding from the cell's surface. Surrounding the cell is a cell envelope consisting of a cell wall and a plasma membrane. Inside this outer covering is the cell's cytoplasmic region, with DNA, ribosomes, and other inclusions.
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