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Discuss evidence that supports the endosymbiotic theory of eukaryotic evolution?
1.) Mitochondria and plastids are relatively the same size as bacteria 2.) Mitochondria and plastids have nucleiod DNA molecules - just like bacteria. 3.) Mitochondria and plastids reproduce the same way as bacteria - binary fission.
What part of the cell contains DNA apart from the nucleus?
The mitochondria contain their own DNA in plants and animals; and chloroplasts contain their own DNA in plants and other photosynthetic organisms. Both of these structures divide (almost like cells) inside the cells.*This is also evidence for the theory of endosymbiosis, in which early cells ate early prokarotic cells (bacteria) and gained new organelles.
What does ribosomes do in a bacteria cell?
A bacterial cell contains about 10,000 ribosomes which co up to 30% of the weight of the bacterium. In contrast to most eukaryote ribosomes, the bacterial ribosomes do not appear to be attached to internal cell membranes, but are found free in the cytoplasm. In functionally, active bacteria the cytoplasm is packed -with free and randomly distributed ribosomes. This dense packing may mask any attachment to internal membranes. Strings of ribosomes have been found loosely attached to the inside of the plasma membrane.
Bacteria are much smaller than most?
Bacteria is typically smaller than Eukaryotes. In fact, Eukaryotes have an organelle called the mitochondria which resemble an enveloped bacteria.
What is the endosymbotic theory?
This theory states that the organelles found in cells were once their own independent cells. Throughout time, these independent organelles were consumed by bigger cells and not digested, but used in exchanged for their services.
Do mitochondria and chloroplasts contain ribosomes?
Yes.They have 70s ribosomes. They are similar to bacteria
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 chloroplasts and mitochondria have in common?
Both of them have 70s ribosomes,DNA,enzymes etc.They both are pre existed bacteria.
Why is ribosomes present in chloroplast and mitochondria?
Ribosomes are present in chloroplasts and mitochondria because both organelles have their own DNA and protein synthesis machinery. They need ribosomes to translate the genetic information from their DNA into proteins that are essential for their proper functioning. Additionally, chloroplasts and mitochondria are believed to have originated from ancient bacteria that were engulfed by a host cell, and these bacteria-like organelles still retain some of the features of their bacterial ancestors, including the presence of ribosomes.
Two organelles that are believed to be remnants of unicellular bacteria are?
Mitochondria and chloroplasts are two organelles believed to be remnants of unicellular bacteria. Mitochondria are thought to have evolved from aerobic bacteria, while chloroplasts are believed to have originated from photosynthetic bacteria.
How are chloroplasts and mitochondria similar to bacteria?
Chloroplasts and mitochondria have their own DNA and ribosomes, similar to bacteria. They also reproduce independently within the cell through a process resembling binary fission, just like bacteria. Additionally, both organelles are thought to have originated from endosymbiotic relationships with ancient bacterial cells.
How does bacteria differ from eukaryotes?
Bacterial cells have a simpler structure. They do not have a separate nucleus or organelles like mitochondria or chloroplasts.
Discuss evidence that supports the endosymbiotic theory of eukaryotic evolution?
1.) Mitochondria and plastids are relatively the same size as bacteria 2.) Mitochondria and plastids have nucleiod DNA molecules - just like bacteria. 3.) Mitochondria and plastids reproduce the same way as bacteria - binary fission.
Two principal organelles of eukaryotes that share features with one another and with bacteria from which they apparently were derived are the?
Two principal organelles of eukaryotes that share features with one another and with bacteria are the mitochondria and chloroplasts. Both organelles have their own DNA and ribosomes, similar to bacteria, and are thought to have originated from ancient endosymbiotic bacteria that were engulfed by early eukaryotic cells.
Simiralities between bacteria and mitochondria?
Bacteria and mitochondria both have their own DNA, reproduce through binary fission, and contain ribosomes for protein synthesis. Additionally, both bacteria and mitochondria have a double membrane structure.
What two organelles are derived from symbiotic bacteria?
Chloroplasts and mitochondria. It is believed they were engulfed by the cells because of the dual membrane present on both. Both are believed to have originated from an endosymbiotic bacteria. Mitochondria's inner matrices contain DNA, and they have many features similar to those of bacteria. Chloroplasts are believed to have come from an endosymbiotic cyanobacteria.
How chloroplast is similar to bacterium?
They got circular DNA. They also have 70s ribosomes.
