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What is the evidence that mitochondria and chloroplasts are semiautnomous oranelles?
Two pertinent pieces. One is the genetic material kept on round form in these organelles that still codes for a few proteins, The other pertinent evidence is the means of reproduction of these organelles; they preform cellular fission, just as bacteria would.
Mitochondria and chloroplasts have their own DNA, ribosomes, and some machinery for protein synthesis. They can replicate independently of the cell through a process called binary fission. Additionally, they have double membranes, which suggest that they may have originated from engulfed prokaryotic organisms that formed a symbiotic relationship with the ancestral eukaryotic cell.
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What evidence indicates that mitochondria and chloroplasts were once free-living organisms?
The endosymbiotic theory suggests that mitochondria and chloroplasts were once free-living organisms based on evidence such as their own circular DNA, ability to replicate independently of the host cell, and presence of double membranes similar to prokaryotic cells. Additionally, mitochondria and chloroplasts have their own ribosomes and produce some of their own proteins, similar to bacteria.
American biologist who provided evidence for the endosymbiotic theory which explains the origin of chloroplasts and mitochondra?
Lynn Margulis is the American biologist known for her work on the endosymbiotic theory. She proposed that chloroplasts and mitochondria evolved from ancient prokaryotic cells that were engulfed by a host cell. Her research provided evidence supporting the idea that these organelles have their own DNA and replicate independently within eukaryotic cells.
How many times is chloroplast larger than mitochondria?
This is a relatively complicated question as the exact origins of mitochondria and how they came to be included in eukaryotic cells is still under investigation and therefore open to debate.Everyone seems to agree though, that they originally come from bacterium and that they were assimilated into eukaryotic cells either because they were useful or through some form of symbiosis.As mitochondria are common to both plant and animal cells it could therefore be argued that they shared a common ancestor at some point in evolution.The inclusion of the chloroplast came later, and a separate line of mitochondrial and chloroplast carrying cells evolved - eventually becoming plants. The line without the chloroplast becoming animals.
Why do scientists suspect that mitochondria and chloroplasts were originally prokaryotic cells?
Scientists suspect that mitochondria and chloroplasts were originally prokaryotic cells because they have their own DNA, ribosomes, and are capable of replicating independently within the cell. Additionally, these organelles have double membranes, similar to some prokaryotic cells that may have been engulfed by early eukaryotic cells through endosymbiosis.
Why are mitochondria and chloroplast considered cells or bacteria?
Mitochondria and chloroplasts were likely free-living bacteria that were engulfed by ancient cells through endosymbiosis. Over time, they became integrated into the host cell and developed a mutually beneficial relationship. They still retain some characteristics of their bacterial ancestors, such as their own DNA and the ability to replicate independently within the cell.
Which is used as evidence for the idea that the domain Eukarya evolved from unicellular organisms?
Mitochondria and chloroplasts have their own DNA.
Is used as evidence for the idea that multicellular organisms evolved from prokaryotes?
Mitochondria and chloroplasts have their own DNA.
What is used as evidence for the idea that the domain Eukarya evolved from unicellular organisms?
mitochondria and chloroplasts have their own DNA
What is the evidence for the endosymbiosis hypothesis?
Evidence for the endosymbiosis hypothesis includes similarities between mitochondria/chloroplasts and bacteria (such as DNA structure and ribosomes), the ability of mitochondria/chloroplasts to replicate independently within cells, and historical precedence in the evolution of eukaryotic organisms. Additionally, the presence of a double membrane in mitochondria and chloroplasts supports the idea that these organelles were once free-living bacteria that were engulfed by an ancestral eukaryotic cell.
The stongest evidence for the endosymbiotic origin of eukaryotic orgelles is the homology between extant prokaryotes and?
...eukaryotic organelles, such as mitochondria and chloroplasts. These organelles have their own DNA, ribosomes, and are similar in size to prokaryotes like bacteria. Additionally, the double membrane structures of mitochondria and chloroplasts resemble what is seen in prokaryotic cells.
What are 3 pieces of scientific evidence that supports the endosymbiotic theory?
The presence of double-membrane structures in mitochondria and chloroplasts similar to bacterial cells supports the theory of endosymbiosis. The existence of circular DNA in mitochondria and chloroplasts, similar to bacterial DNA, provides evidence of their bacterial origin. Phylogenetic studies reveal that the genetic material in mitochondria and chloroplasts is more closely related to certain groups of bacteria than to eukaryotic nuclear DNA, supporting their evolutionary history as once-independent organisms.
What evidence is there for endosymbiotic theory?
Evidence for endosymbiotic theory includes the presence of organelles like mitochondria and chloroplasts that have their own DNA and ribosomes, similar to prokaryotic cells. Additionally, these organelles reproduce independently within cells, similar to bacteria. Genetic sequencing has shown that the DNA of mitochondria and chloroplasts is more closely related to bacterial DNA than to the DNA of the eukaryotic host cell.
What is the evidence for endosymbiotic hypothesis?
The endosymbiotic hypothesis postulates that an early eukaryotic cells lacking mitochondria and chloroplasts phagocytosed early aerobic prokaryotes and photosynthetic prokaryotes and rather than
What part of the cell contains DNA apart from the nucleus?
The mitochondria contain their own DNA in plants and animals; and chloroplasts contain their own DNA in plants and other photosynthetic organisms. Both of these structures divide (almost like cells) inside the cells.*This is also evidence for the theory of endosymbiosis, in which early cells ate early prokarotic cells (bacteria) and gained new organelles.
Which two organelles are used as evidence supporting enosymbiotic theory?
The mitochondria and chloroplasts are used as evidence supporting the endosymbiotic theory. Both organelles have their own circular DNA, replicate independently of the cell, and have a double membrane structure similar to certain prokaryotes.
What is used as evidence for the idea of a domain Eukarya evolved from unicellular organisms?
Mitochondria and chloroplasts have their own dna
Which is used as evidence for the idea that multicellular organisms evolved from prokaryotes?
Mitochondria and chloroplasts have their own DNA
