What is endosymbiotic theory and explain the theory?

What is endosymbiotic theory and explain the theory?

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 are the steps of the endosymbiotic theory?

Terms in this set (6)

• Prokaryotic cell membrane folded into cytoplasm.
• Nuclear membrane, endoplasmic recticulum, and golgi body are now independent of external membrane.
• Ancestoral eukaryote engulfed, but did not kill prokaryote.
• The prokaryote survived inside the eukaryote and each evolved a dependence of each other.

What are 3 pieces of evidence for the endosymbiotic theory?

In part (c) the description of three observations that support the endosymbiotic theory was requested. Evidence could be from structure, biochemistry, or processes — particularly involving similarities between prokaryotes and mitochondria or prokaryotes and chloroplasts.

What is the main idea of the theory of endosymbiosis?

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 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 organelles are in endosymbiotic theory?

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 two organelles are included in the endosymbiosis theory?

According to the Endosymbiotic Theory, endosymbiosis became the means by which organelles such as mitochondria and chloroplasts within eukaryotic cells came about.

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 is an example of the endosymbiotic theory?

An example of the endosymbiotic theory is when a eukaryotic cell engulfed a respiratory prokaryotic cell and instead of digesting it, the eukaryotic cell kept it and incorporated it into its life cycle. These respiratory prokaryotic cells evolved into the present-day mitochondria in eukaryotic cells.

How does the endosymbiotic theory explain the origin of eukaryotes?

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 is the endosymbiotic theory and which organelles are involved?

How are mitochondria part of endosymbiotic theory?