What is the Difference Between Autogenous Theory and Endosymbiotic Theory?
🆚 Go to Comparative Table 🆚The autogenous theory and the endosymbiotic theory are two different hypotheses that explain the origin of eukaryotic cells and their organelles. The key differences between these two theories are:
- Origin of organelles:
- Autogenous theory proposes that eukaryotic cells evolved directly from a single prokaryotic ancestor, and the nucleus and cytoplasm formed through evolutionary changes within that single lineage.
- Endosymbiotic theory suggests that eukaryotic cells originated from the symbiotic relationship between multiple prokaryotes, with mitochondria and chloroplasts forming from the integration of bacteria into a host cell.
- Scope:
- Autogenous theory is accepted for the endoplasmic reticulum, Golgi apparatus, and the nuclear membrane, as well as for organelles enclosed by a single membrane.
- Endosymbiotic theory is accepted for mitochondria and chloroplasts, which have a double membrane that is believed to have resulted from the engulfment of bacteria by a larger cell.
In summary, autogenous theory proposes that eukaryotic organelles evolved from within the ancestral cell, while endosymbiotic theory suggests that certain organelles, such as mitochondria and chloroplasts, originated from the integration of bacteria into a host cell.
Comparative Table: Autogenous Theory vs Endosymbiotic Theory
The autogenous theory and endosymbiotic theory are two different perspectives on the origin of eukaryotic cells and their organelles. Here is a table comparing the key differences between the two theories:
| Feature | Autogenous Theory | Endosymbiotic Theory |
|---|---|---|
| Origin of Eukaryotic Cells | Eukaryotic cells evolved directly from a single prokaryotic ancestor | Eukaryotic cells formed through the symbiotic merger of multiple prokaryotic cells |
| Organelles | Explains the origin of the nucleus, cytoplasm, endoplasmic reticulum, Golgi, and nuclear membrane, as well as organelles enclosed by a single membrane | Explains the origin of mitochondria and chloroplasts within eukaryotic cells |
| Acceptance | Accepted for organelles enclosed by a single membrane | Accepted for organelles with multiple membranes, such as mitochondria and chloroplasts |
The autogenous theory suggests that eukaryotic cells evolved directly from a single prokaryotic ancestor, while the endosymbiotic theory proposes that eukaryotic cells formed through the symbiotic merger of multiple prokaryotic cells. The autogenous theory is accepted for organelles enclosed by a single membrane, whereas the endosymbiotic theory is accepted for organelles with multiple membranes, such as mitochondria and chloroplasts.
- Endosymbiosis vs Symbiosis
- Endosymbiont vs Endophyte
- Endosymbiosis vs Invagination
- Autecology vs Synecology
- Endosmosis vs Exosmosis
- Eukaryotic vs Prokaryotic
- Autotrophs vs Heterptrophs
- Exogenous vs Endogenous Budding
- Endocytosis vs Transcytosis
- Autophagy vs Apoptosis
- Endocytosis vs Phagocytosis
- Abiogenesis vs Biogenesis
- Endogenous vs Exogenous Antigens
- Autogenic vs Allogenic Succession
- Endocytosis vs Exocytosis
- Eukaryotic Cells vs Prokaryotic Cells
- Bacteria vs Eukaryotes
- Symbiosis vs Mutualism
- Protein Synthesis in Prokaryotic vs Eukaryotic