The endosymbiotic hypothesis postulates that an early eukaryotic cells lacking mitochondria and chloroplasts phagocytosed early aerobic prokaryotes and photosynthetic prokaryotes and rather than digesting them, formed a symbiotic relationship with them, offering them nutrients and shelter (therefore the 'endo-' part) and getting very efficient energy generating systems in return. This hypothesis was proposed after mitochondria and chloroplasts were found to share many structure and mechanistic similarities with aerobic and photosynthetic prokaryotes, and that mitochondria and chloroplasts contained their own genetic material and capable of producing some proteins. The hypothesis is the norm now as to the evolution of mitochondria and chloroplasts however many questions remain to be solved such as whether the evolution of eukaryotism occurred before or after the assimilation of other cells through endosymbiosis.
They arose from a symbiotic union of two organisms.
The endosymbiotic theory proposes that some organelles, such as mitochondria and chloroplasts, were once free-living prokaryotic cells that were engulfed by a host cell through endocytosis. Over time, these prokaryotic cells formed a symbiotic relationship with the host cell, eventually evolving into permanent organelles within the eukaryotic cell.
Lynn Margulis was the scientist who proposed and championed the endosymbiotic theory. She provided evidence to support the idea that eukaryotic cells evolved from symbiotic relationships between different prokaryotic organisms.
Lynn Margulis proposed the endosymbiotic theory, suggesting that organelles such as mitochondria and chloroplasts in eukaryotic cells evolved from symbiotic relationships between different types of prokaryotic cells. This hypothesis explains the origins of protists and other eukaryotic organisms through the merging of different cell types rather than gradual evolution from a single organism.
Yes, both mitochondria and chloroplasts are considered to be endosymbiotic organelles because they are believed to have evolved from free-living bacteria that were engulfed by ancestral eukaryotic cells. This symbiotic relationship enabled the host cell to obtain energy more efficiently through aerobic respiration (mitochondria) and photosynthesis (chloroplasts).
They arose from a symbiotic union of two organisms.
They are thought to be evolved from photosynthetic bacteria. They have circular DNA and 70s ribosomes as bacteria
The endosymbiotic hypothesis postulates that an early eukaryotic cells lacking mitochondria and chloroplasts phagocytosed early aerobic prokaryotes and photosynthetic prokaryotes and rather than
The endosymbiotic theory proposes that some organelles, such as mitochondria and chloroplasts, were once free-living prokaryotic cells that were engulfed by a host cell through endocytosis. Over time, these prokaryotic cells formed a symbiotic relationship with the host cell, eventually evolving into permanent organelles within the eukaryotic cell.
The two hypotheses that were merged to form the endosymbiotic theory are the autogenous hypothesis, which suggests that organelles evolved from prokaryotic cells that became internal structures in a eukaryotic cell, and the symbiotic hypothesis, which proposes that organelles originated from the mutualistic relationship between different types of cells. These two ideas were combined to explain the presence of organelles like mitochondria and chloroplasts in eukaryotic cells.
The endosymbiotic theory is widely accepted as a strong scientific hypothesis; however, definitive proof is challenging due to the lack of direct observational evidence from billions of years ago when the theorized events occurred. While there is substantial supporting evidence, such as the similarities between organelles like mitochondria and chloroplasts with free-living bacteria, the theory cannot be definitively proven beyond any doubt.
They are origined from bacteria.They were evolved through endosymbiotic living.
A hypothesis
Lynn Margulis was the scientist who proposed and championed the endosymbiotic theory. She provided evidence to support the idea that eukaryotic cells evolved from symbiotic relationships between different prokaryotic organisms.
This is the endosymbiotic theory.
Lynn Margulis proposed the endosymbiotic theory, suggesting that organelles such as mitochondria and chloroplasts in eukaryotic cells evolved from symbiotic relationships between different types of prokaryotic cells. This hypothesis explains the origins of protists and other eukaryotic organisms through the merging of different cell types rather than gradual evolution from a single organism.
Aerobic bacteria evolved into mitochondria.It is explained in endosymbiotic theory.