For cells to comprise all the life we see on Earth they must be able to organize proteins and other chemical compounds. Cell theory states that all living things are made out of cells, and biogenesis theory proposes that all living cells came from other existing cells, so cells cannot spontaneously arise from non-living things (abiogenesis). The distinction between eukaryotes and prokaryotes is based upon two theories regarding the role of cells in biology. As previously mentioned, the major difference between prokaryotic and eukaryotic cells is that prokaryotic cells lack a nucleus or organelles encased by a membrane, while eukaryotic cells have these features. Eukaryotes (living things with eukaryotic cell structures) and prokaryotes (living things with a prokaryotic cell structure) are similar in many respects, but they have key differences including different organelles that carry out different functions. However, there are different kinds of cells and cells are divided into one of two groups: prokaryotic cells and eukaryotic cells. Of Cells And Cell MembranesĪll living things are composed of cells. While this is the basic difference between prokaryotes and eukaryotes, there are other differences that merit a close examination. Whereas, prokaryotes are cells that don’t have a nucleus or membrane-encased organelles. The difference between eukaryotic and prokaryotic cells is that eukaryotic cells are those which have a membrane-bound nucleus that contains genetic material, as well as organelles that are also membrane-bound.
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