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engulfing prokaryotic cells through a process called endosymbiosis. Over time, these prokaryotic cells formed a mutualistic relationship with the host cell, eventually evolving into the mitochondria and chloroplasts found in eukaryotic cells today.
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What does the endosymbiont hypothesis propose?
The endosymbiont hypothesis suggests that eukaryotic cells evolved from a symbiotic relationship between different types of prokaryotic cells. This hypothesis explains the presence of organelles such as mitochondria and chloroplasts in eukaryotic cells, which are thought to have originated from ancient prokaryotic cells that were engulfed by a host cell but not digested.
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 does the theory of endosymbiosis explain?
concerns the origins of mitochondria and plastids (e.g. chloroplasts), which are organelles of eukaryotic cells. According to this theory, these organelles originated as separate prokaryotic organisms which were taken inside the cell as endosymbionts. Mitochondria developed from proteobacteria (in particular, Rickettsiales or close relatives) and chloroplasts from cyanobacteria. concerns the origins of mitochondria and plastids (e.g. chloroplasts), which are organelles of eukaryotic cells. According to this theory, these organelles originated as separate prokaryotic organisms which were taken inside the cell as endosymbionts. Mitochondria developed from proteobacteria (in particular, Rickettsiales or close relatives) and chloroplasts from cyanobacteria. concerns the origins of mitochondria and plastids (e.g. chloroplasts), which are organelles of eukaryotic cells. According to this theory, these organelles originated as separate prokaryotic organisms which were taken inside the cell as endosymbionts. Mitochondria developed from proteobacteria (in particular, Rickettsiales or close relatives) and chloroplasts from cyanobacteria.
Where can DNA be found in plant cells?
DNA in plant cells can be found in the nucleus, which is where the majority of genetic material is located. Additionally, some plant organelles, such as chloroplasts and mitochondria, also contain 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.
What does the endosymbiont hypothesis propose?
The endosymbiont hypothesis suggests that eukaryotic cells evolved from a symbiotic relationship between different types of prokaryotic cells. This hypothesis explains the presence of organelles such as mitochondria and chloroplasts in eukaryotic cells, which are thought to have originated from ancient prokaryotic cells that were engulfed by a host cell but not digested.
Are mitochondria and chloroplasts both found in all eukaryotic Cells?
No, both mitochondria and chloroplasts are not found in all eukaryotic cells. Mitochondria are found in all eukaryotic cells as the powerhouse of the cell, producing energy through cellular respiration. Chloroplasts, however, are only found in plant cells and some protists, where they perform photosynthesis to produce energy from sunlight.
Where is the cells DNA largely confined?
In eukaryotic cells, DNA is confined to the nucleus, except for the DNA in the mitochondria and chloroplasts.
What organelles are associated with ednosymbiont theory?
The endosymbiont theory is associated with mitochondria and chloroplasts. It proposes that these organelles originated from primitive prokaryotic cells that were engulfed by ancestral eukaryotic cells and formed a symbiotic relationship.
Chloroplasts and mitochondria are?
Chloroplasts are organelles found in plant cells that carry out photosynthesis, converting sunlight into energy. Mitochondria are organelles found in animal and plant cells that produce energy through cellular respiration. Both organelles have their own DNA and are thought to have originated as free-living prokaryotic organisms that were engulfed by ancestral eukaryotic cells.
Is the mitrocondria in the plant cell?
Yes, a mitochondria exists in all eukaryotic cells, including plant cells. Though the chloroplasts derive the energy plants use, the mitochondria is the source of energy at night, when the chloroplasts are inoperative.
How do mitochondria and chloroplasts become part of modern eukaryotic cells?
Because of the 69 inside of the cell lol
Chloroplasts are to plants as what are to aerobic respiration?
Mitochondria are to aerobic respiration. Mitochondria are responsible for producing ATP through cellular respiration in eukaryotic cells, similar to how chloroplasts are responsible for photosynthesis in plant cells.
What does the endosymbiotic theory purpose?
The endosymbiotic theory proposes that eukaryotic cells originated from symbiotic relationships between different types of prokaryotic cells that eventually became integrated within the host cell. This theory explains the presence of organelles like mitochondria and chloroplasts in eukaryotic cells.
What contains mitochondria and chloroplast?
Mitochondria are found in eukaryotic cells, including plants, animals, and fungi. Chloroplasts are specific to plant cells and some protists. Both organelles are involved in energy production - mitochondria in cellular respiration, and chloroplasts in photosynthesis.
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.
Why do animal cells not have chloraplast?
Chloroplasts (as well as Mitochondria) are endosymbionts. This means that they are cells, living within another cell. Historically, eukaryotic cells had no mitochondria or chloroplasts (and mitochondria and chloroplasts existed by themselves outside of cells). The current hypothesis is that a cell tried to engulf a mitochondria (by phagocytosis) but failed in digesting it. Over time, some of the mitochondrial DNA (mtDNA) became part of the host cell's genome. This cell is a common ancestor to both plants and animals, which is why both have mitochondria. A cell with mitochondria then did the same thing with chloroplasts, absorbing one, and taking some of its ctDNA etc. Because not all cells that had mitochondria absorbed chloroplasts there were cells with mitochondria only, and cells with mitochondria and chloroplasts. The ones with chloroplasts evolved to become plant cells, and those without evolved to become animal cells.
