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What does the endosymbiotic theory say?

What does the endosymbiotic theory say?

The endosymbiotic theory states that some of the organelles in eukaryotic cells were once prokaryotic microbes. Mitochondria and chloroplasts are the same size as prokaryotic cells and divide by binary fission. Mitochondria and chloroplasts have their own DNA which is circular, not linear.

What is the endosymbiotic theory of 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.

Who proposed the theory of endosymbiosis?

Lynn Margulis
The endosymbiotic theory was articulated in 1905 and 1910 by the Russian botanist Konstantin Mereschkowski, and advanced and substantiated with microbiological evidence by Lynn Margulis in 1967.

What is the endosymbiotic theory Bioninja?

• The origin of eukaryotic cells can be explained by the endosymbiotic theory. An endosymbiont is a cell which lives inside another cell with mutual benefit. Eukaryotic cells are believed to have evolved from early prokaryotes that were engulfed by phagocytosis.

What are the 3 pieces of evidence that support the endosymbiotic theory?

10 Best Evidence of Endosymbiotic Theory

  • i) Presence of DNA:
  • ii) Size of Ribosomes:
  • iii) Inhibition by antibiotics:
  • iv) Evolutionary relationship:
  • v) Same size:
  • vi) Plasma-Membrane:
  • vii) Enzyme secretion:
  • viii) Replication and protein synthesis:

What is the endosymbiotic theory and why is it important?

The endosymbiotic theory states that many years ago, respiratory and photosynthetic prokaryotic cells were engulfed by eukaryotic cells. The endosymbiotic theory is important because it represents an event that allowed eukaryotic cells to make their own energy.

Why is the endosymbiotic theory a theory?

Eukaryotic cells may have evolved when multiple cells joined together into one. They began to live in what we call symbiotic relationships. The theory that explains how this could have happened is called endosymbiotic theory. An endosymbiont is one organism that lives inside of another one.

How did endosymbiosis come about?

After being absorbed by a eukaryotic cell, it developed a symbiotic relationship with its host cell. The chloroplast was originally a prokaryotic cell that could undergo photosynthesis (eg. cyanobacteria). Like the mitochondria, the photosynthesizing bacteria became dependent on the host cell after being engulfed.

What are 3 evidences of the endosymbiotic theory?

How can endosymbiotic theory explains the origin of mitochondria and chloroplast?

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 are the five main evidences of endosymbiotic theory?

What observations support the endosymbiotic theory?

Describe THREE observations that support the endosymbiotic theory. Mitochondria contain their own DNA. Chloroplasts contain their own DNA. Mitochondria can self-replicate.

What is the endosymbiotic theory simplified?

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.

How does the endosymbiosis theory explain the origin of the energy?

What are three observations that support the endosymbiotic theory?

What are two evidences of the endosymbiotic theory?

Numerous lines of evidence exist, including that mitochondria and chloroplasts have their own circular DNA (prokaryotes also have circular DNA), mitochondria and chloroplasts have a double membrane (the inner membrane would have initially been the ingested prokaryote’s single membrane, and the outer membrane initially …

Why is endosymbiosis important to evolution?

Endosymbiosis has had a profound impact on the evolution and diversification of eukaryotes. Mitochondria and plastids, the energy-generating organelles of modern-day eukaryotes, evolved from free-living prokaryotes that were taken up by eukaryotic hosts and transformed into permanent subcellular compartments.

What is the importance of the endosymbiotic theory?

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 best supports the endosymbiotic theory?

18- Origin of Life. 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.

What are 3 pieces of evidence for the endosymbiotic theory?

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