Here's a breakdown:
* Prokaryotes: "Pro" means before and "karyon" means nucleus. This implies that these cells existed before the evolution of the nucleus.
* Eukaryotes: "Eu" means true and "karyon" means nucleus. These cells have a true nucleus and other membrane-bound organelles like mitochondria, Golgi apparatus, etc.
Key differences between prokaryotes and eukaryotes:
* Nucleus: Prokaryotes lack a membrane-bound nucleus, while eukaryotes have a well-defined nucleus containing their genetic material (DNA).
* Organelles: Prokaryotes lack other membrane-bound organelles, while eukaryotes have a variety of organelles with specific functions.
* Size: Prokaryotes are generally smaller than eukaryotes.
* DNA Structure: Prokaryotic DNA is circular and located in a region called the nucleoid, while eukaryotic DNA is linear and enclosed within the nucleus.
Because bacteria lack these key features of eukaryotic cells, they are classified as prokaryotes.
