Fossil records indicate that eukaryotes evolved from prokaryotes somewhere between 1.5 to 2 billion years ago. Two proposed pathways describe the invasion of prokaryote cells by two smaller prokaryote cells.

Who evolved first prokaryotes or eukaryotes?

Between prokaryotes and eukaryotes, which type of cells are believed to have evolved first? Scientists have concluded that prokaryote life forms preceded the more complex eukaryotes. All organisms on Earth are classified into two basic cell types. "Kary" means nucleus.

How did the prokaryotes evolved?

The first prokaryotes were adapted to the extreme conditions of early earth. It has been proposed that archaea evolved from gram-positive bacteria as a response to antibiotic selection pressures. Microbial mats and stromatolites represent some of the earliest prokaryotic formations that have been found.