The evidence that supports the endosymbiotic theory includes: 1 mitochondria have a circular genome 2 mitochondria divide separately from the division of the cell itself and do so in a manner similar to binary fission 3 mitochondria are enclosed within a double membrane 4 mitochondria and bacteria are similar in size and shape. The theory of endosymbiosis states that eukaryotic cells evolved when some prokaryotes were engulfed by others and avoided being digested the theory states that chloroplasts developed from. The theory is known as the endosymbiotic theory, literally meaning inside symbiont or internal symbiont from cambridge english corpus the endosymbiotic theory can be divided roughly into a number of stages, which happened over a long period of time.
Endosymbiosis occurs when a symbiont lives inside the body or the cells of another organism it is a very widespread phenomenon in living things it is a very widespread phenomenon in living things [1. There are several lines of evidence that support endosymbiosis theory these modern organisms with endosymbiotic relationships with aerobic bacteria have verified the endosymbiotic theory, which explains the origin of mitochondria and chloroplasts from bacteria. Endosymbiotic theory holds that chloroplasts and mitochondria came about through the evolution of blue-green algae and bacteria through endocytosis endocytosis occurs when a substance passes into a cell through the cell's membrane, and then the cell plasma fuses together to keep the material inside.
The endosymbiotic theory is widely regarded due to the many shared biochemical and morphological characteristics of mitochondria with bacteria, including dna organization and similarities protein synthesising machinery and membrane composition. The endosymbiotic theory is based upon the idea that eukaryotic cells evolved in steps beginning with the stable incorporation of chemo-organotrophic and phototrophic symbionts from the domain bacteria this essay reviewed the evidence that supports this theory after investigating the molecular, physiological and morphological evidence, it is. The endosymbiotic theory states that a host cell and a bacteria may easily become interdependent on one another through the cycle of evolution both mitochondria and chloroplasts were such bacteria that became embedded in host animal and plant cells to produce energy for the cell itself.
On the basis of experimental evidence, serial endosymbiotic theory (set) is now almost universally accepted as the most plausible explanation for evolution of eukaryotes the mechanism of primary endosymbiosis is envisioned as phagocytosis of a bacterium (or bacteria) by another prokaryotic cell. Based on decades of accumulated evidence, the scientific community supports margulis's ideas: endosymbiosis is the best explanation for the evolution of the eukaryotic cell what's more, the evidence for endosymbiosis applies not only to mitochondria, but to other cellular organelles as well. Endosymbiotic theory was first developed and popularized by lynn margulis in the 1970s the theory proposes that mitochondria and plastids (eg, chloroplasts) were originally bacteria that were engulfed by two separate ancestral cells but not digested.
Margulis wrote her first article on the endosymbiotic theory in 1967, two years after she completed her phd at the time, she was a single mother without a permanent teaching position she was also writing her first book on endosymbiosis, which sparked a lively controversy when it was published in 1970. What are the key arguments against the endosymbiotic theory update cancel what is the endosymbiotic theory and how can it explain the origin of eukaryotic cells what is the evidence supporting the endosymbiotic theory ask new question jarle kotsbak, studied electronics & evolutionary biology at university of trondheim. A fairly simple piece of evidence for the endosymbiotic hypothesis is the fact that both mitochondria and chloroplasts have double phospholipid bilayers this appears to have arisen by mitochondria and chloroplasts entering eukaryotic cells via endocytosis. Abundant evidence has been found for endosymbiosis: 1 mitochondria and chloroplasts are similar in size and morphology to bacterial prokaryotic cells, though the mitochondria of some organisms are known to be morphologically variable.
The endosymbiotic hypothesis has developed greatly over the past century continued research on this topic has resulted in a considerable amount of evidence and support for this hypothesis, often referred to now as the endosymbiotic theory. Important evidence in support of endosymbiotic theory comes from organelle genomes organelles tend to retain a miniaturized prokaryotic chromosome encoding 200 proteins or less in the case of plastids [ 6 ] or 63 proteins or less in the case of mitochondria [ 7 . The endosymbiotic hypothesis might be called a theory, but experimental evidence can't be provided to test it only circumstantial evidence is available in support of the proposal, which is the most likely explanation for the origin of mitochondria.