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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.
Scientists believe that mitochondria and chloroplasts originated from ancient prokaryotic cells through a process called endosymbiosis. This theory proposes that mitochondria were once free-living bacteria that were engulfed by a primitive eukaryotic cell, forming a symbiotic relationship. Similarly, chloroplasts are thought to have originated from ancient photosynthetic bacteria that were also engulfed by a eukaryotic cell.
The 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.
it 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.
Both 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.
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How do scientists think mitochondria originated?
Scientists believe that mitochondria originated from ancient bacteria that were engulfed by early eukaryotic cells through a process called endosymbiosis. Over time, the relationship between the host cell and the engulfed bacteria became mutually beneficial, leading to the evolution of mitochondria as specialized organelles responsible for energy production in eukaryotic cells.
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?
Mitochondria and chloroplasts contain their own DNA, separate from the cell's nuclear DNA. This unique DNA is circular, similar to bacterial DNA, leading scientists to hypothesize that these organelles were once independent bacteria that were engulfed by a precursor to eukaryotic cells in a symbiotic relationship.
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.
How do scientists think chloroplasts evolved?
Scientists believe that chloroplasts evolved from ancient photosynthetic bacteria that were engulfed by ancient plant cells through a process called endosymbiosis. Over time, these bacteria formed a symbiotic relationship with the host cell, eventually becoming what we now recognize as chloroplasts. This theory is supported by the structural and genetic similarities between chloroplasts and modern photosynthetic bacteria.
How do scientists think mitochondria originated?
Scientists believe that mitochondria originated from ancient bacteria that were engulfed by early eukaryotic cells through a process called endosymbiosis. Over time, the relationship between the host cell and the engulfed bacteria became mutually beneficial, leading to the evolution of mitochondria as specialized organelles responsible for energy production in eukaryotic cells.
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?
Mitochondria and chloroplasts contain their own DNA, separate from the cell's nuclear DNA. This unique DNA is circular, similar to bacterial DNA, leading scientists to hypothesize that these organelles were once independent bacteria that were engulfed by a precursor to eukaryotic cells in a symbiotic relationship.
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.
Where did people originate?
Scientists believe from geological evidence that humans originated in Kenya, Ethiopia, and Tanzania.
Which organelle help provide cells with energy?
The mitochondria is the organelle that provides cells with energy through the process of cellular respiration. This organelle is often referred to as the "powerhouse" of the cell due to its role in producing ATP, the energy currency of the cell.
What similarities do mitochondria and chloroplasts share?
Mitochondria and chloroplasts are both membrane-bound organelles found in eukaryotic cells. They both generate energy for the cell: mitochondria through aerobic respiration to produce ATP, and chloroplasts through photosynthesis to convert sunlight into energy. Additionally, both organelles contain their own DNA and ribosomes, allowing them to produce some of their own proteins independently from the cell's nucleus.
Which organelles outside the cell nucleus contain genetic material?
Mitochondria and chloroplasts are the organelles outside the cell nucleus that contain genetic material. Mitochondria have their own DNA known as mitochondrial DNA (mtDNA), and chloroplasts contain their own DNA called chloroplast DNA (cpDNA).
When do scientists believe life originated on Earth?
Scientists believe life originated on Earth around 3.5 to 4 billion years ago. This is based on fossil evidence of simple life forms found in rocks dating back to that time period and the presence of key molecules necessary for life in early Earth environments.
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 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.
