What is the endosymbiosis theory regarding mitochondria and chloroplasts?
Explanation: The Endosymbiotic Theory states that the mitochondria and chloroplast in eukaryotic cells were once aerobic bacteria (prokaryote) that were ingested by a large anaerobic bacteria (prokaryote). This theory explains the origin of eukaryotic cells.
What is endosymbiotic theory examples?
The most significant examples of endosymbiosis are represented by the endosymbiotic acquisition of plastids and mitochondria, introducing photosynthesis and respiration to eukaryotes. However, there are numerous other endosymbioses that evolved more recently and repeatedly across the tree of life.
Which theory explains the origin of chloroplasts and mitochondria?
Endosymbiosis theory
The theory of how mitochondria, chloroplasts and other membrane-bound organelles in eukaryotic cell likely arose from a symbiosis between aerobic prokaryotes and host anaerobic eukaryotic ancestors. Developed by Lynn Margulis.
What are mitochondria and chloroplasts examples of?
Mitochondria — the “power plants” of both animal and plant cells — and chloroplasts — photosynthesis centers found only in plants — are both examples of specialized eukaryotic cell compartments. These cell compartments are referred to as organelles.
How did mitochondria and chloroplasts arise in eukaryotic cells?
Mitochondria and chloroplasts likely evolved from engulfed bacteria that once lived as independent organisms. At some point, a eukaryotic cell engulfed an aerobic bacterium, which then formed an endosymbiotic relationship with the host eukaryote, gradually developing into a mitochondrion.
What is the theory of endosymbiotic evolution?
The endosymbiotic theory posits that some eukaryotic cell organelles, such as mitochondria and plastids, evolved from free-living prokaryotes. Available data indicate that the mitochondrial endosymbiosis initiated the evolution of the eukaryotic cell, as suggested by Margulis.
How do you associate endosymbiosis with chloroplasts mitochondria and bacteria?
The endosymbiosis theory postulates that the mitochondria of eukaryotes evolved from an aerobic bacterium (probably related to the rickettsias) living within an archaeal host cell and the chloroplasts of red algae, green algae, and plants evolved from an endosymbiotic cyanobacterium living within a mitochondria- …
Which of the following statements is true about both mitochondria and chloroplasts?
Which of the following is true concerning both mitochondria and chloroplasts? Both mitochondria and chloroplasts are responsible for predominantly oxidative metabolic processes.
How does endosymbiotic theory explain mitochondria?
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 is an example of endosymbiosis quizlet?
For example, chlororachniophytes likely evolved when an heterotrophic eukaryote engulfed a green algae. The engulfed cell contains a vestigial nucleus called a nucleomorph.
How are mitochondria part of endosymbiotic theory?
What is an example of secondary endosymbiosis?
Secondary endosymbiosis occurs when a eukaryotic cell engulfs a cell that has already undergone primary endosymbiosis. They have more than two sets of membranes surrounding the chloroplasts. The chloroplasts of brown algae are derived from a secondary endosymbiotic event.