By Josh Alexander
are the basic structural, functional and biological unit of all known living organisms. Cells are the smallest unit of life that is classified as a living thing, and are often called the "building blocks of life".
All cells have a cell membrane. A prokaryote is an organism of the kingdom Monera (or Prokaryotae), comprising the bacteria and cyanobacteria, characterized by the absence of a distinct, membrane-bound nucleus
A Eukaryote is a single-celled or multicellular organism whose cells contain a distinct membrane bound nucleus. The Eukaryotic cell is also older than Prokaryote.