- #1
Thejas15101998
- 43
- 1
What happened to the membrane bound organelles that were present in the eukaryote that gulped the primary endosymbiont (that is, the eukaryote that gulped a prokaryote), after the secondary endosymbiosis.
Endosymbiotic theory is a scientific explanation for the origin of eukaryotic cells. It proposes that mitochondria and chloroplasts, two membrane-bound organelles found in eukaryotic cells, were originally free-living prokaryotic cells that were engulfed by larger host cells. Over time, these prokaryotic cells evolved into the specialized organelles we see today.
According to endosymbiotic theory, the process of endosymbiosis occurred over millions of years. It is believed that a larger host cell engulfed a smaller prokaryotic cell, forming a symbiotic relationship. Over time, the smaller cell evolved into a specialized organelle within the host cell, resulting in the formation of membrane-bound organelles.
There is a significant amount of evidence that supports endosymbiotic theory. This includes the similarities between mitochondria and chloroplasts and free-living prokaryotic cells, such as their size, shape, and DNA structure. Additionally, both organelles have their own DNA and can reproduce independently, similar to prokaryotic cells. The presence of endosymbiotic relationships in other organisms also supports the theory.
Endosymbiotic theory explains that mitochondria and chloroplasts were once free-living prokaryotic cells that were engulfed by larger host cells. These cells evolved over time to form the specialized organelles we see in eukaryotic cells today. This theory also explains the similarities between the functions and structures of mitochondria and chloroplasts and those of prokaryotic cells.
While endosymbiotic theory is widely accepted, there are some challenges to the theory. One of the main challenges is the lack of a clear explanation for how the initial endosymbiotic event occurred. Additionally, some scientists argue that the similarities between mitochondria and chloroplasts and prokaryotic cells could be the result of convergent evolution rather than endosymbiosis. However, the overwhelming amount of evidence in support of endosymbiotic theory makes it the most widely accepted explanation for the origin of membrane-bound organelles in eukaryotic cells.