Which of the following would be considered supporting evidence for the endosymbiotic theory?
(The DNA molecules present in the nucleus of eukaryotic cells are in the form of strings and are not circular.) Therefore gene expression similar to the bacterial system can be regarded as evidence that supports the endosymbiotic theory of the origin of eukaryotic cells from prokaryotic cells.
How does the endosymbiosis theory explain the origin of the energy?
The endosymbiotic hypothesis for the origin of mitochondria (and chloroplasts) suggests that mitochondria are descended from specialized bacteria (probably purple nonsulfur bacteria) that somehow survived endocytosis by another species of prokaryote or some other cell type, and became incorporated into the cytoplasm.
What two organelles came about because of endosymbiosis?
There are two major organelles in eukaryotic organisms that have resulted from endosymbiosis, mitochondria (common to most eukaryotes) and chloroplasts (found in plants and algae only), as well as a few less obvious examples.
Why is the endosymbiotic theory important in understanding the origin of life?
Endosymbiosis is important because it is a theory that explains the origin of chloroplast and mitochondria. It is also a theory that explains how eukaryotic cells came to be.
What evidence supports the model of Endosymbiotic origin for mitochondria and chloroplasts?
There is broad evidence to show that mitochondria and plastids arose from bacteria and one of the strongest arguments to support the endosymbiotic theory is that both mitochondria and plastids contain DNA that is different from that of the cell nucleus and that they have their own protein biosynthesis machinery.
Which one of the following is not a strong argument that supports the endosymbiotic theory?
“The exterior structure similar to bacterial cell walls” IS NOT an evidence in favour of the endosymbiotic theory. Both mitochondria and chloroplasts are double membrane bound.
Which piece of evidence best supports the endosymbiotic theory of organelle evolution?
Which piece of evidence best supports the endosymbiotic theory of organelle evolution? The outer membrane of a mitochondrion and chloroplast resemble a eukaryotic cell while the inner membrane resembles that of a bacterial cell.
How does the endosymbiotic theory account for the origins of the following eukaryotic organelles?
Mitochondria and the origin of eukaryotes The leading hypothesis, called the endosymbiotic theory, is that eukaryotes arose as a result of a fusion of Archaean cells with bacteria, where an ancient Archaean engulfed (but did not eat) an ancient, aerobic bacterial cell.
What does the endosymbiotic theory attempt to explain?
The endosymbiotic theory explains the evolution of mitochondria and chloroplasts. Before mitochondria and chloroplasts were organelles in a cell, they were free prokaryotic cells that were absorbed by eukaryotic cells. After being absorbed by a eukaryotic cell, it developed a symbiotic relationship with its host cell.
What is the endosymbiotic theory and which organelles are involved?
The endosymbiotic theory deals with the origins of mitochondria and chloroplasts, two eukaryotic organelles that have bacteria characteristics. Mitochondria and chloroplasts are believed to have developed from symbiotic bacteria, specifically alpha-proteobacteria and cyanobacteria, respectively.
What is endosymbiotic theory of organelles?
Endosymbiotic theory posits that plastids and mitochondria were once free-living prokaryotes and became organelles of eukaryotic cells. The theory started with plastids [ 1] and was further developed for mitochondria [ 2 ].
When was the endosymbiotic theory rejected?
It was rejected by cell biologists in the 1920s and revived in the 1960s [ 3 ]. The main strength of the theory is that it accounts for the physiological and biochemical similarity of organelles to prokaryotic cells [ 4, 5 ]. Important evidence in support of endosymbiotic theory comes from organelle genomes.
Can gene trees replace endosymbiotic theory?
Endosymbiotic theory explains why organelles resemble free-living bacteria. Gene trees are well-suited to testing endosymbiotic theory, but not to replacing it. Testing endosymbiotic theory requires that we keep LGT and pangenomes in mind.
Where can I find endosymbiotic theory online?
Available online at www.sciencedirect.com ScienceDirect Endosymbiotic theory for organelle origins Verena Zimorski, Chuan Ku, William F Martin and Sven B Gould Endosymbiotic theory goes back over 100 years.