Once, single-cell life claimed sole dominion over the earth. For about three billion years, the generation of incompatible unicellular organisms has been feeding, growing and multiplying. Now the New studies show complex decisions in single-celled organisms
They become predators and prey, develop and spread in ancient waters and drought, forming complex and dynamic ecosystems in every ecological niche on the planet. Around 600 million years ago, some even crossed the threshold of multicellularity.
But, today, single-celled organisms are synonymous with primitive and simple terms. But, new research shows that they can do more than their distant cousins suspect.
In trying to replicate the experiment more than a century ago, Harvard Medical School system biologists now provide convincing evidence that at least one single-celled organism formed in a Stentor roeselii tube and has a hierarchy of avoidance behavior.
If, in this case, you exposed to the same stimulation, impulsive particle pulses can change your mind about how you should respond.
You have to be “smart” to figure out what to avoid, where to eat and all the other things that organisms must do to live. they can have complex possibilities to do that.
These single cells characterized by a large size and unique tubular body. The tubular surface and bells lined with hair projections called eyelashes, which used to float and make swirls in the surrounding fluid that throws food into the mouth.
At the other end of their body, they give off retention which prevents them from staying still while eating.
With a steady microscope, pipette, and hands, Jennings documented S. roeselii’s behavior when exposed to environmental toxins in the form of carmine dust.
The small surprise was that they could not reproduce the results, the researchers said. He was angry at his attempt to repeat Jennings’s experiment.
But, as a mathematician, he found it difficult to persuade others when he taught the molecular processing laboratory in medical school.
I presented this idea during a meeting in my workgroup and said that he said something about the abilities of each cell. We no longer think about how cells work, researchers say.
Led by an irresistible curiosity and history, without formal support, the three took part in a long-standing side project.
They hunt everywhere and even search for local waters, they found a supplier in England, who supplied the organism from the golf pool and transported it across the Atlantic.
But, they did not see the pure and orderly hierarchy of behavior that Jennings documented, there seems to be a significant difference between subjects – one copy can bend and eyelashes change before the contract closed, but the other can only be contracted while the other bends and contracts.
So the three of them gave up their basic knowledge as quantitative biologists. They develop methods to encode the different behaviors they see in a series of characters and then use statistical analysis to look for patterns.
They do the simplest things first, but as you continue to stimulate, they “decide” to try something different. S. roeselii has no brain, but there seems to be a mechanism that allows him to change his mind after feeling that the irritation lasts too long, the researchers said.
This hierarchy gives a clear impression of the complex form of choices made in the body. Researchers say it’s better to do one thing than another.
Analysis has shown that for each S. roeselii there is an almost uniform opportunity to choose to shrink or reject. A very disturbing note for scientists studying how cells process information at the molecular level.
The decision between the two behaviors is consistent, with each organism flying an impartial coin regardless of previous actions, the authors said.
This experiment forces us to think about the existence of a form of cellular “knowledge” in which individual cells can process information in complex ways and make decisions to respond, researchers continued.
Every life has the same reason, and our results give us at least some evidence why we need to broaden our vision to include this kind of thinking in contemporary biological research.
It also shows how often we ignore things, not because they don’t exist, but because it’s important to see them, researchers added. that makes this research very interesting.