Question
If eukaryotic all came about due to endosymbiosis, what would result from that? 1. Preserve DNA from the original ancestor that remains unchanged. 2. Ancient prokaryotic living inside of modern eukaryotes. 3. Every organism would have the same set of body systems and features. 4. Similar structures in eukaryotes with slight variations depending on their use.
Answers
Answered by
GPT-4o mini
Endosymbiosis is a biological theory that explains the origin of eukaryotic cells. It suggests that certain organelles, particularly mitochondria and chloroplasts, were once free-living prokaryotic organisms that were engulfed by ancestral eukaryotic cells. Over time, these prokaryotes formed symbiotic relationships with their host cells.
From the context of endosymbiosis, here’s how each of the options you provided relates to the theory:
1. **Preserve DNA from the original ancestor that remains unchanged.**
This is not entirely accurate. While the organelles (like mitochondria and chloroplasts) do have their own DNA, it is not completely unchanged; rather, it has evolved over time. They share similarities with bacterial DNA, but they have also adapted and lost some genes that the host eukaryotic cell takes over.
2. **Ancient prokaryotic living inside of modern eukaryotes.**
This is the most accurate option. Modern eukaryotic cells do contain remnants of ancient prokaryotes in the form of mitochondria and chloroplasts, which are considered to be the descendants of those engulfed prokaryotic organisms.
3. **Every organism would have the same set of body systems and features.**
This is not true. While endosymbiosis explains a common origin of certain structures in eukaryotes, it does not mean that all eukaryotic organisms would have the same body systems and features. Eukaryotic diversity is vast, with different adaptations for various environments and lifestyles.
4. **Similar structures in eukaryotes with slight variations depending on their use.**
This option is somewhat accurate, as it relates to the idea of homologous structures arising through common ancestry. Many eukaryotes have similar organelles (like mitochondria), but their cellular structures and functions can vary depending on their ecological roles and evolutionary pathways.
In summary, the best option that results from endosymbiosis is option **2: Ancient prokaryotic living inside of modern eukaryotes.** This highlights the important role that endosymbionts have played in the evolution of eukaryotes.
From the context of endosymbiosis, here’s how each of the options you provided relates to the theory:
1. **Preserve DNA from the original ancestor that remains unchanged.**
This is not entirely accurate. While the organelles (like mitochondria and chloroplasts) do have their own DNA, it is not completely unchanged; rather, it has evolved over time. They share similarities with bacterial DNA, but they have also adapted and lost some genes that the host eukaryotic cell takes over.
2. **Ancient prokaryotic living inside of modern eukaryotes.**
This is the most accurate option. Modern eukaryotic cells do contain remnants of ancient prokaryotes in the form of mitochondria and chloroplasts, which are considered to be the descendants of those engulfed prokaryotic organisms.
3. **Every organism would have the same set of body systems and features.**
This is not true. While endosymbiosis explains a common origin of certain structures in eukaryotes, it does not mean that all eukaryotic organisms would have the same body systems and features. Eukaryotic diversity is vast, with different adaptations for various environments and lifestyles.
4. **Similar structures in eukaryotes with slight variations depending on their use.**
This option is somewhat accurate, as it relates to the idea of homologous structures arising through common ancestry. Many eukaryotes have similar organelles (like mitochondria), but their cellular structures and functions can vary depending on their ecological roles and evolutionary pathways.
In summary, the best option that results from endosymbiosis is option **2: Ancient prokaryotic living inside of modern eukaryotes.** This highlights the important role that endosymbionts have played in the evolution of eukaryotes.