AP BIOLOGY

Detailed explanation-1: -Abstract. The endosymbiotic theory posits that some eukaryotic cell organelles, such as mitochondria and plastids, evolved from free-living prokaryotes. Available data indicate that the mitochondrial endosymbiosis initiated the evolution of the eukaryotic cell, as suggested by Margulis.

Detailed explanation-2: -Evidence for the endosymbiotic theory Mitochondria (and chloroplasts) reproduce by binary fission, the process that prokaryotes use to reproduce. In contrast, eukaryotic cells reproduce by mitosis. If the mitochondria (or chloroplasts) are removed from a eukaryotic cell, the cell has no way to produce new ones.

Detailed explanation-3: -The theory of how mitochondria, chloroplasts and other membrane-bound organelles in eukaryotic cell likely arose from a symbiosis between aerobic prokaryotes and host anaerobic eukaryotic ancestors. Developed by Lynn Margulis.

Detailed explanation-4: -The endosymbiotic theory explains how eukaryotic cells evolved. The large and small cells formed a symbiotic relationship in which both cells benefited. Some of the small cells were able to break down the large cell’s waste s for energy. They supplied energy not only to themselves but also to the large cell.