What is meant by endosymbiont theory?

noun. (evolutionary biology) A theory suggesting that the organelles such as mitochondria and chloroplasts within the eukaryotic cell came about as a result of the early endosymbiosis between prokaryotic endosymbionts and eukaryotic host cell.

What is an example of the endosymbiont theory?

An example of an endosymbiosis is the relationship between Rhizobium and the plant legumes. Rhizobium is the endosymbiont that occur within the roots of legumes. Rhizobium fix atmospheric nitrogen to convert it into a nitrogen form that is ready for use by the legume.

What is the endosymbiont theory quizlet?

The Endosymbiotic Theory. States that organelles such as chloroplasts and mitochondria were once free-living prokaryotes which eventually lived symbiotically within larger cells, forming modern day eukaryotes. Evidence for the Endosymbiotic Theory.

What is the key idea of the endosymbiont theory?

The endosymbiotic theory is the accepted mechanism for how eukaryotic cells evolved from prokaryotic cells. First published by Lynn Margulis in the late 1960s, the Endosymbiont Theory proposed that the main organelles of the eukaryotic cell were actually primitive prokaryotic cells that had been engulfed by a different,…

How would you define endosymbiotic theory?

Endosymbiotic theory is the unified and widely accepted theory of how organelles arose in organisms , differing prokaryotic organisms from eukaryotic organisms. In endosymbiotic theory, consistent with general evolutionary theory, all organisms arose from a single common ancestor.

What does the endosymbiont theory entail?

The endosymbiotic theory is the accepted mechanism for how eukaryotic cells evolved from prokaryotic cells . It involves a cooperative relationship between two cells which allow both to survive-and eventually led to the development of all life on Earth .

What does the endosymbiont theory suggest?

The endosymbiont theory suggests that mitochondria and chloroplasts evolved from ancient bacteria that were ingested by primitive nucleated cells.