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What is found in mitochondria and chloroplasts that is not found in any other organelle except the nucleus leading scientists to believe that these two organelles are actually ancient prokayotes?
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What parts of a cell do scientists think were once free-living organisms?
Mitochondria and chloroplasts are thought to have once been a free prokaryotic cell.
Why do scientists suspect that mitochondria and chloroplasts were originally prokaryotic cells?
Scientists saw that the membranes of mitochondria and chloroplasts resembled the cell membranes of free-living prokaryotes. This led to two hypotheses. One proposed that mitochondria evolved from endosymbiotic prokaryotes that were able to use oxygen to generate energy rich ATP. The other proposed that chloroplasts evolved from endosymbiotic prokaryotes that had he ability to photosynthesize. Mitochondria and chloroplasts share many features with free-living bacteria, such as there ribosomes have similar size and structure and they reproduce by binary fission. These similarities provide strong evidence of a common ancestry between bacteria and the organelles of living eukaryotic cells.
Why do scientists believe that mitochondria were separate organisms?
There are several reasons. First, mitochondria have a capsule around them very similar to bacterial capsules. Second, mitochondria are the only organelles in animal cells with their own genetic material. Third, mitochondria replicate themselves. Fourth, mitochondria are genetically similar to some bacteria.
Where do scientists believe mitochondria and chloroplasts originated?
Some scientists believe that mitochondria and chloroplasts were at one time independent-living bacteria that were engulfed by eukaryotic cells, forming an endosymbiotic relationship. This is because both mitochondria and chloroplasts have their own DNA and replicate themselves within the cells in which they occur.
How do the finding of margulis and other scientists-that mitochondria and cholarplasts have third own DNA like a cell nucleus-support the hypothesis of endosymbiosis?
concept that mitochondria and chloroplasts are the result of years of evolution initiated by the endocytosis of bacteria and blue-green algae which, instead of becoming digested, became symbiotic.
What parts of a cell do scientists think were once free-living organisms?
Mitochondria and chloroplasts are thought to have once been a free prokaryotic cell.
Why do scientists suspect that mitochondria and chloroplasts were originally prokaryotic cells?
Scientists saw that the membranes of mitochondria and chloroplasts resembled the cell membranes of free-living prokaryotes. This led to two hypotheses. One proposed that mitochondria evolved from endosymbiotic prokaryotes that were able to use oxygen to generate energy rich ATP. The other proposed that chloroplasts evolved from endosymbiotic prokaryotes that had he ability to photosynthesize. Mitochondria and chloroplasts share many features with free-living bacteria, such as there ribosomes have similar size and structure and they reproduce by binary fission. These similarities provide strong evidence of a common ancestry between bacteria and the organelles of living eukaryotic cells.
Why did scientists place bacteria in their kingdom the monera?
Scientists placed bacteria in their own kingdom, the Monera, because bacteria lack the nuclei, mitochondria, and chloroplasts found in other forms of life
Why did the scientists place bacteria in their own kingdom the Monera?
Scientists placed bacteria in their own kingdom, the Monera, because bacteria lack the nuclei, mitochondria, and chloroplasts found in other forms of life
How do some scientists think that the first eukaryotes evolved?
By various bacteria ingesting but not digesting other bacteria, most likely the precursors of mitochondria (and/or chloroplasts).
Do bacteria have plastids?
Some bacteria have chloroplasts. For example, cyanobacteria. They are photosynthetic bacteria No, bacteria do not have chloroplasts because they are prokaryotic which means they can't have membrane bound organelles other than ribosomes.. Chloroplasts are membrane bound organelles. As for the cyanobacteria, they are indeed photosynthetic, but they still don't have chloroplasts. It is somewhat misleading. They were once called blue-green algae (they even fooled earlier scientists) but are now considered bacteria because they lack a membrane bound nucleus and chloroplasts.
Why do scientists believe that mitochondria were separate organisms?
There are several reasons. First, mitochondria have a capsule around them very similar to bacterial capsules. Second, mitochondria are the only organelles in animal cells with their own genetic material. Third, mitochondria replicate themselves. Fourth, mitochondria are genetically similar to some bacteria.
Why did scientist place bacteria in Their own kingdom monera?
Scientists placed bacteria in their own kingdom, the Monera, because bacteria lack the nuclei, mitochondria, and chloroplasts found in other forms of life
Where do scientists believe mitochondria and chloroplasts originated?
Some scientists believe that mitochondria and chloroplasts were at one time independent-living bacteria that were engulfed by eukaryotic cells, forming an endosymbiotic relationship. This is because both mitochondria and chloroplasts have their own DNA and replicate themselves within the cells in which they occur.
Why do scientists believe that mitochondria may have evolved from bacteria?
This theory is called the endosymbiotic theory. Mitochondria and chloroplasts both have their own ribosomes and their own genetic material, and they are also membrane-bound organelles. This is evidence that a long time ago, a prokaryotic cell incorporated another prokaryotic cell within itself, in its cytoplasm. This eventually came to create the first chloroplasts and mitochondria.
What is a synonym for cytosol?
Cytosol is cytosol, as mitochondria are mitochondria. It would be confusing in Science if there were synonyms and so Scientists try to use universal names for things. Cytosol is part of the cytoplasm, but this cannot be used as a synonym as cytoplasm contains all cell organelles as well as cytosol.
How do scientists think mitochondria originated?
Mitochondria are evolved from bacteria.Symbiotic living aerobic bacteria turned into mitochondria.
