The idea that eurkaryotes developed from one larger prokaryote

The hypothesis that eukaryotic cells evolved from a symbiotic association of prokaryotes—endosymbiosis—is particularly well supported by studies of mitochondria and chloroplasts, which are thought to have evolved from bacteria living in large cells.

              EndoSymbiosis is the process by which we study that the eukaryotes have developed from the prokaryotes.

Explanation:

                     Prokaryotes are the cell that have no prominent nuclei and organelies. Evolution is the phenomena in which the prokaryotes have developed to eukaryotas by the process of endosymbiosis  ( the process in which a large prokaryotic cell engulf the other bacteria and the bacteria survive inside the cell ). E.g When prokaryotic cell engulf aerobic bacteria that settle inside as a mitochondria.The same way the auto synthetatic becteria also settle inside as chloroplast.

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prophase is the first step in mitosis and will show one huge circle (nucleus) and centrioles - nothing is being done to it. metaphase is the third step and where the chromatids meet in the middle and the centrioles are at opposite ends. anaphase is the fourth step and where the chromatids start to split/separate. telophase is the second to last step where the chromatids start to split along with the centrioles, it looks like there is getting ready to be two different cells. if you follow this, then it should you to answer what it looks like. have a great day and i hope i you! if i did not answer your question or you are confused, let me know and i will you as much as i can.