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Where do scientists believe mitochondria and chloroplasts originated?
Wiki User
∙ 14y ago
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.
Wiki User
∙ 11y ago
Wiki User
∙ 14y agoThe widely held belief, although this is just a theory, is that early single celled orginisms, similar to modern archezoa, engulfed the ancestors of cyanobacteria, which became chloroplasts, and aerobic heterotrophic (eats and uses oxygen) bacteria to become mitocondria. This is called endosymbiosis.
Wiki User
∙ 12y agoit is mostly said that about 15 billions years ago there were found some organisms perform the functions of mitochondria and chloroplast and these organisms were engulfed by other organisms and those organisms become the part as organelles this concept is called endosymbiosis.
Wiki User
∙ 13y agoBoth are believed to have evolved after a bacterium and a eukaryotic cell had a mutual relationship.
The mitochondria evolved first, when bacteria joined a cell because the cell provided food for the bacteria, and the bacteria provided energy from that food for the cell. Eventually, they became one and the bacteria (mitochondria) shrank way down.
The chloroplast happened later, when a photosynthetic bacterium had a mutual relationship with eukaryotic cells, and eventually they became one cell, with the bacteria evolving into mere chloroplasts.
Wiki User
∙ 10y agoAccording to endosymbiotic theory, early mitochondrion,chloroplast were bacteria.They lived symbiotically in eukaryotes.
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Where does substrate-level ATP synthesis take place?
I believe it occurs in the cytoplasm of mitochondria or chloroplasts.
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?
A circular piece of DNA that codes for some few proteins. Google endosymbiotic theory, Or Lynn Margulis.
Why are mitochondria and chloroplast considered cells or bacteria?
I'm not sure about chloroplasts, but with mitochondria evolutionary history has led biolgists to believe that the mitochondria now present in eukaryotic cells to have originated a couple billion years ago when a very basic eukaryotic cell injested (ate) a bacterial cell. Then, instead of digesting it for food, the bacterial cell just stayed inside and functioned with the eukaryotic cell. The evidence for this lies in the structure, genetic information (mitochondria have their own DNA and replicate separately) and proteins present. This is why it could be considered a cell (bacterial), because it, at one point in history, was an actual bacterial cell. i think the above answer is a little misleading to the question. so my answer is mitochondria and chloroplast are not considered cells or bacteria. bacteria is a cell and mitochondria and chloroplasts can be found in cells (plant and animal cells, not bacteria 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.
The first living cell originated?
Scientists theorize that the first living cells appeared spontaneously. They believe the process took place around four billion years ago.
Which organelle help provide cells with energy?
mitochondria and chloroplasts
Where does substrate-level ATP synthesis take place?
I believe it occurs in the cytoplasm of mitochondria or chloroplasts.
Most scientists believe modern human beings originated on which continent?
Africa
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?
A circular piece of DNA that codes for some few proteins. Google endosymbiotic theory, Or Lynn Margulis.
Scientists who argue that mordern humans evolved from a single population believe that humans came from the continent of?
Most scientists believe that humans originated in Africa.
What similarities do mitochondria and chloroplasts share?
Mitochondria and chloroplasts have their own genetic informations, which is one of the reasons why people believe that mitochondria and chloroplasts have originated as a bacteria that started mutualism with an early eukaryote. This relationship is known as the endosymbiotic theory.
Where did people originate?
Scientists believe from geological evidence that humans originated in Kenya, Ethiopia, and Tanzania.
Why are mitochondria and chloroplast considered cells or bacteria?
I'm not sure about chloroplasts, but with mitochondria evolutionary history has led biolgists to believe that the mitochondria now present in eukaryotic cells to have originated a couple billion years ago when a very basic eukaryotic cell injested (ate) a bacterial cell. Then, instead of digesting it for food, the bacterial cell just stayed inside and functioned with the eukaryotic cell. The evidence for this lies in the structure, genetic information (mitochondria have their own DNA and replicate separately) and proteins present. This is why it could be considered a cell (bacterial), because it, at one point in history, was an actual bacterial cell. i think the above answer is a little misleading to the question. so my answer is mitochondria and chloroplast are not considered cells or bacteria. bacteria is a cell and mitochondria and chloroplasts can be found in cells (plant and animal cells, not bacteria cells).
What organelle produces carbohydrates for the plant cell?
It is known as the chloroplast. Due to the fact that the chloroplast has its own set of DNA, scientists believe that the chloroplasts were originally prokaryots that invaded eukaryotic cells and were beneficial, so the eukaryotic cells did not try to destroy it (endosymbiotic theory).
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.
What cell organelles capture and release of energy?
In plants and a few other organisms that can do photosynthesis, the organelle that uses the energy from sunlight to form chemical bonds (namely,glucose) and thus "capture" energy is the chloroplast. The energy in the bonds of these compounds (glucose) can later be released during the process of cellular respiration. The organelle associated with cellular respiration is the mitochondria.
What continent scientists believe early modern humans came from?
Scientists believe early modern humans originated in Africa. This theory is supported by fossil and genetic evidence that suggests humans evolved in Africa before migrating to other continents.
