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What is one piece of evidence for the endosymtic origin of eukaryotic organelles?
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Are both chloroplasts and mitochondria bounded by two membranes?
Yes. The outer membrane is similar to modern eukaryotic membranes, such as the plasma membranes of animals and plants. The inner membrane is similar to modern prokaryotic membranes, found in bacteria. This difference has been taken as one piece of evidence to support the theory of the endosymbiotic origin of these two organelles, i.e. the idea that each of these organelles formed originally from the engulfing of a prokaryotic cell by a eukaryotic one.
What is the origin of chloroplasts?
Mitochondria and chloroplasts likely evolved from engulfed prokaryotes that once lived as independent organisms. At some point, a eukaryotic cell engulfed an aerobic prokaryote, which then formed an endosymbiotic relationship with the host eukaryote, gradually developing into a mitochondrion. Eukaryotic cells containing mitochondria then engulfed photosynthetic prokaryotes, which evolved to become specialized chloroplast organelles.
Scientists have fossil evidence for which idea for the origin of life?
The Biological origin of Life.
Why is the symbiotic cell theory important?
Symbiosis is the close association between individuals of different species, occurring within a whole community. It is the interactions of different species and it is important to maintain a healthy ecosystem.
Is evidence for the endosymbiont theory explaining the origin of mitochondria and chloroplasts?
According to the endosymbiotic theory of the origin of both chloroplasts and mitochondria, the ancestors of these two organelles were free-living prokaryotic cells.This theory states that an early eukaryotic cell engulfed a prokaryotic cell by endocytosis, much as one of our phagocytic white blood cells engulfs a bacterium.On this occasion, however, for some reason (a mutation having changed a protein on the surface of the smaller cell, perhaps?) the prokaryote was not digested, but remained in a structure which evolved into the modern chloroplast, whose outer membrane was the infolded eukaryotic one, and with an inner membrane representing the original prokaryotic plasma membrane. This particular prokaryote was, unlike the larger cell, capable of photosynthesis.In this relationship, both species benefited. The larger cell gained the ability to synthesize its own organic compounds from inorganic ones, and the smaller cell no longer had to search for protection or inorganic nutrients.The same theory assigns the origin of mitochondriato a similar, much earlier, event involving the engulfing of an aerobic prokaryote by a larger cell."Endosymbiosis" refers to the relationship between two species (symbiosis) in which one is inside (endo-) the other.Evidence for the theory includes:the size and shape of the organelles;their possession of a surrounding double membrane, the outer membrane more eukaryotic and the inner more prokaryotic in chemistry;the presence of DNA in both organelles, in the form of a circular molecule lacking associated proteins, with genes, transcription, and translation;the presence in both organelles of ribosomes that are similar in size to prokaryotic ones;the division by both organelles in a manner like binary fission.
The stongest evidence for the endosymbiotic origin of eukaryotic orgelles is the homology between extant prokaryotes and?
And the mitochondria in eukaryote cells.
What is the actual observation that provides the strongest evidence for the possible origin of eukaryotic cytoskeleton?
homologs of actin and tubulin are found in certain bacteria.
Which theory tries to explain the origin of endoplasmic reticulum nuclear membrane?
The theory of endosymbiosis which believes that nuclear membranes and organelles such as the mitochondrian have evolved from a semi"mutation" in which a prokaryotic cell was engulfed by a eukaryotic cell and instead of being digested it survived and has evolved into key features of the eukaryotic cell. Evidence for this is the fact that the mitochondrian have their own ribosomes ( of which are the prokaryotic variety) and their own DNA which allow them to make their own proteins that can be used in synthesis of adenosine triphosphate (ATP)
Are both chloroplasts and mitochondria bounded by two membranes?
Yes. The outer membrane is similar to modern eukaryotic membranes, such as the plasma membranes of animals and plants. The inner membrane is similar to modern prokaryotic membranes, found in bacteria. This difference has been taken as one piece of evidence to support the theory of the endosymbiotic origin of these two organelles, i.e. the idea that each of these organelles formed originally from the engulfing of a prokaryotic cell by a eukaryotic one.
What is the autogenic hypothesis of the origin of the eukaryotic cell?
Autogenic means produced from within, or self-generating. Therefore the 'autogenic hypothesis' is most likely to be that the organelles and structures of a Eukaryotic cell were self-generated by a Prokaryotic cell - and this is how Eukaryotic cells were created. The theory of Endosymbiosis is much more widely accepted.
What is the origin of chloroplasts?
Mitochondria and chloroplasts likely evolved from engulfed prokaryotes that once lived as independent organisms. At some point, a eukaryotic cell engulfed an aerobic prokaryote, which then formed an endosymbiotic relationship with the host eukaryote, gradually developing into a mitochondrion. Eukaryotic cells containing mitochondria then engulfed photosynthetic prokaryotes, which evolved to become specialized chloroplast organelles.
Who is Lynne Margulis?
Lynn Margulis was a professor in the Department of Geosciences at the University of Massachusetts Amherst and an American biologist. Margulis is best known for her theory on the origin of eukaryotic organelles, and also for her contributions to the endosymbiotic theory. Margulis died on November 22, 2011 in Amherst, Massachusetts after suffering a stroke. Margulis was 73 years old.
What has the author J Reinert written?
J. Reinert has written: 'Origin and continuity of cell organelles' -- subject(s): Cell organelles, Formation
Scientists have fossil evidence for which idea for the origin of life?
The Biological origin of Life.
Who is margulis?
Lynn Margulis was a professor in the Department of Geosciences at the University of Massachusetts Amherst and an American biologist. Margulis is best known for her theory on the origin of eukaryotic organelles, and also for her contributions to the endosymbiotic theory. Margulis died on November 22, 2011 in Amherst, Massachusetts after suffering a stroke. Margulis was 73 years old.
Why is the symbiotic cell theory important?
Symbiosis is the close association between individuals of different species, occurring within a whole community. It is the interactions of different species and it is important to maintain a healthy ecosystem.
What is the likely origin of mitochondria?
the likely orign of mitochondria is like this random glup of toop. It has all that Shmuff in it.
