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Hypothetical LUCA organisms can be the gate to understanding how the first organisms formed on Earth.


"A digital representation illustrating how LUCA was already under attack from viruses even at 4.2 billion years ago. Credit: Science Graphic Design" (ScitechDaily, Unlocking the Secrets of LUCA, Earth’s Earliest Life Form)

"Everything alive today derives from a single common ancestor known affectionately as LUCA (Last Universal Common Ancestor). " (ScitechDaily, Unlocking the Secrets of LUCA, Earth’s Earliest Life Form)

A hypothetical organism called the last universal common ancestor(LUCA) is the stem cell of all living organisms. If that organism or its genomes are found that offers a new possibility to create new stem cell models. And it offers the possibility of searching for extraterrestrial life forms. 

The last universal common ancestor (LUCA) can be the ancestor of all living organisms. The hypothetical LUCA can tell, why evolution started to favor complex cell structures. Those complex structures made possible organisms like amoebas and then far later mammals and finally humans. The problem is that nobody found LUCA organisms yet. 

But then we must realize that in the first stage flora separated from fauna. Fauna ate flora, that created sugars using mitochondria and photosynthesis as the power source. So, LUCA is the stem cell of all living organisms. 

That organism can answer the question, was the first mitochondrial formed in LUCA or before it? The LUCA can also answer the question, of why vegetables do not seem to be intelligent. Plant intelligence and communication are quite new research objectives. And maybe LUCA can open the mystery, of why plants or producers don't need to think as animals do. 

In the image above this text, the LUCA organism is under attack. Attackers are viruses. The question is: when do viruses come on stage? Viruses require cells to produce their structures and genomes. We can ask where viruses and mitochondria something the same. Were first viruses abortive mitochondria? Or did the very first viruses carry mitochondria? That means those viruses could use mitochondria to move. 

The very first organisms didn't have mitochondria. They used external power sources like volcanic heat as energy sources. The cells came before viruses and the case where flora separated from fauna and viruses is interesting. 

Diversity and complexity in life forms guarantee that life can stay alive on Earth. The virus epidemic cannot destroy all organisms. The early lifeforms can tell things like what conditions were in young Earth. And how long timeline do things like genetic disorders have?


https://scitechdaily.com/unlocking-the-secrets-of-luca-earths-earliest-life-form/


https://setiandfermiparadox.wordpress.com/2024/07/18/hypothetical-luca-organisms-can-be-the-gate-to-understanding-how-the-first-organisms-formed-on-earth/

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