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How did the life start on earth?some people say there was a cell which contained...

aarushrao's profile pic

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How did the life start on earth?

some people say there was a cell which contained life.......

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catd1115's profile pic

Posted (Answer #6)

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As mentioned above we do not, and cannot know the answer. Aside from disagreements about religious views, even scientists do not know. While the theory related above about the emergence of life from common elements in the warmth of sea water seems to be the current popular scientific view, we must remember that science continues to advance over time and there may yet be other theories that are equally provable or believable. Science may seem like it is full of static definitive concepts, but if we study history we know that is not true and that the aim of science is to get closer and closer to the truth, even if we can never know it for certain.

frizzyperm's profile pic

Posted (Answer #7)

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How did the life start on earth?

some people say there was a cell which contained life.......

"How did the life start on earth? some people say there was a cell which contained life......." Aarushrao.

No scientist says that life on Earth started with a single-celled organism. A cell is a very advanced biological lifeform, there is no way a fully-functioning cell could instantly create itself. This is a very strong misconception about the origins of life on Earth.

There is also another misconception; that one second there was just rocks and chemicals them 'pop' life started. It was not like that, it was a slow and gradual assembling of various organic chemicals (not alive) and over millions of years. They gradually evolved into more and more complex chemistry (still not life). Eventually an organic molecule formed which had the chemical ability to make copies of its molecular structure (reproducing, but still not living) from there it was still millions and millions and millions of years before a basic proto-cell was formed.

I do find it very sad that most people are prepared to form a very strong, fixed opinion on this issue without actually investigating what we already know. Thank you for asking the question and keep looking for answers.

 

pohnpei397's profile pic

Posted (Answer #2)

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We'll never know for sure.  Scientists generally believe that various elements needed to create life were present in the waters of ancient Earth (perhaps brought by comets).  The warm waters gave them a chance to mix together until life was able to form.

speamerfam's profile pic

Posted (Answer #3)

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I have read that the first forms of life were bacteria, and as pohnpie397 states, that these were formed from a combination of elements in sea water, in very deep sea vents.  It does not appear that there is much disagreement among scientists on this theory. 

najm1947's profile pic

Posted (Answer #9)

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A very interesting post (#7), elaborating the tranformation of atoms to organic substances but not living:

Eventually an organic molecule formed which had the chemical ability to make copies of its molecular structure (reproducing, but still not living) - Frizzy

I agree with Frizzy that scientists have re-produced this event in lab. But the subsequent statement:

from there it was still millions and millions and millions of years before a basic proto-cell was formed. - Frizzy

I have not heard that they have been able to reproduce this event yet in the lab. It is still a theory and has to be achieved to prove it.

The formation of organic molecules and their ability to copy has been established, but why the copying takes place is a mystery. How and why they transform into a living cell is still a bigger mystery that may never get resolved.

However, whether these mysteries are resolved or not, the process of transformation of atoms to organic substances and then complex cells started in a fluid medium, water - the natural solvent, that facilitates the movement of individual atoms and provides maximum freedom to get attached to each other under suitable conditions.

The most interesting thing about this discussion is that we want to know "How did the life start on earth?" but I wonder if anyone can answer the question "What is Life?"

 

etotheeyepi's profile pic

Posted (Answer #10)

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I think that the discussion of the origin of living forms might benefit from a definition of simple and complex.  I don't know what it would be, maybe number of genes or number of chemical reactions per second, or ratio of surface area to volume.

Also, the discussion might benefit from a definition of life which does not include the word, cell.  Surely the first form with maintained homeostasis or replicated itself was not a cell because cells are too complex, but I don't really know how to know if one form is more complex than another.

television123's profile pic

Posted (Answer #11)

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LIFE ON THE EARTH BEGAN ABOUT HUNDEREDS OF YEARS AGO ON THE EARH IN THE FORM OF SINGLE CELL IN THE SEA SLOWLY THEY DEVELOPED INTO THE ORGANISMS OF MORE AND MORE COMPLEX CELLS . A FEW OF THESE CREATURES BEGAN TO LIVE ON LAND WHILE OTHERS CONTINUE TO LIVE IN SEA IN THIS WAY LIFE BEGAN ON THE EARTH

 

bandmanjoe's profile pic

Posted (Answer #12)

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I think, whether you side with the religious view of creation, or the scientific theory of evolution, or whatever other theories are out there, we all have to agree on one thing.  Life is a very complex thing, irregardless of the type of life we are referring to.  You don't just start life by putting it together, like Legos or pieces of a jigsaw puzzle.  I think it has to come from somewhere, created by something, or someone.  Until science can realistically do that, I think we're stuck.

aarushrao's profile pic

Posted (Answer #14)

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A very interesting post (#7), elaborating the tranformation of atoms to organic substances but not living:

Eventually an organic molecule formed which had the chemical ability to make copies of its molecular structure (reproducing, but still not living) - Frizzy

I agree with Frizzy that scientists have re-produced this event in lab. But the subsequent statement:

from there it was still millions and millions and millions of years before a basic proto-cell was formed. - Frizzy

I have not heard that they have been able to reproduce this event yet in the lab. It is still a theory and has to be achieved to prove it.

The formation of organic molecules and their ability to copy has been established, but why the copying takes place is a mystery. How and why they transform into a living cell is still a bigger mystery that may never get resolved.

However, whether these mysteries are resolved or not, the process of transformation of atoms to organic substances and then complex cells started in a fluid medium, water - the natural solvent, that facilitates the movement of individual atoms and provides maximum freedom to get attached to each other under suitable conditions.

The most interesting thing about this discussion is that we want to know "How did the life start on earth?" but I wonder if anyone can answer the question "What is Life?"

 

It will be strange that it is a question inscience but i am answering it a bit philosphically
As you asked ''What is life?''
Life does not have a meaning but it is a word which has given us a chance to answer it..........

etotheeyepi's profile pic

Posted (Answer #15)

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For the question: What is life, or how did life begin?

The scientific answer might be homeostatic chemistry.

 

najm1947's profile pic

Posted (Answer #16)

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in reply to 15:

Homeostatic chemistry may explaining to some extent the continuity of life in the living organism but I wonder how does it explain: "How did life begin?"

 

etotheeyepi's profile pic

Posted (Answer #17)

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Hey Mr Najm,

Here in California, the high school biology text books list ten things that make a living organism; things like reproduction, biogenesis, cell structure, change over time, using energy, and maintaining homeostasis. I think that the text book lists at least five more.

The question for this discussion asks us to speculate about the nature of the first organism or proto-organism. So I speculate that the first thing that might be called living must have been some kind of self-maintaining chemical reaction.

Maybe it was two chemical reactions, one that oxidizes a chemical like maybe a ferrous ion to a ferric ion, and another that uses light or heat to reduce the products of that oxidation.

najm1947's profile pic

Posted (Answer #20)

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In reply to 17:

I speculate that the first thing that might be called living must have been some kind of self-maintaining chemical reaction. - Eto

Life is not just a self-maintaining chemical reaction. Its much more than that, a mystery not yet known completely.

etotheeyepi's profile pic

Posted (Answer #21)

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Hey Mr Najm,

As far as I know, everything, which science knows about organisms, is chemistry. Maybe someone will discover something about organisms, which is not chemistry. If they do that, I bet they will win a Noble Prize. 

 

najm1947's profile pic

Posted (Answer #22)

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Eto, Please read my post again. I said:

Life is not just a self-maintaining chemical reaction. Its much more than that,...

Had it been just a self-maintaining chemical reaction, there would have been no ageing and no end (death) being a 'self-maintaining chemical reaction'.

Living organism is chemistry but NOT 'only chemistry' as you have put it.

etotheeyepi's profile pic

Posted (Answer #23)

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Hey Mr Najm,

I doubt that the first hemeostatic chemistry would be self-sustaining enough to be immortal.  It would likely produce enough waste to kill itself, or it would lack nutrients to continue. There would be no preditors to eat it, so it could wait almost indefinetly.

 

astrosonu's profile pic

Posted (Answer #25)

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Scientists say that life on Earth began after a asteroid crashed the earth, and from then onwards the Bacteria came and slowly and slowly life began to start.

topalle's profile pic

Posted (Answer #26)

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i guess that there were such conditions that there was no oxygen...lots of lightning...high temperature...etc... under which certain basic molecules like proteins, amino acids, glucose...etc were formed. this is how the first organism was formed. This might have been an oceanic plant

mad-e's profile pic

Posted (Answer #27)

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Millions of yers after the big bang life on earth prevailed due to the presence of water and air.....microorganisms were the first creatures on earth..!

litteacher8's profile pic

Posted (Answer #4)

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Since you posted this in the science section, I am assuming you don’t want a biblical or philosophical answer.  I would argue that while people have wondered this question since there were people, there really is no way to know the answer and no reason to know.  It may be a religious or scientific mental exercise, but that is about it.

angel-girl's profile pic

Posted (Answer #13)

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Through dust. God created the earth and made man through dust.

ironjon29's profile pic

Posted (Answer #18)

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God.

nafi3's profile pic

Posted (Answer #19)

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hi every body

I think nobody know the answer of this guestion just God.

Muslims belive that God created earth,sky, etc and then people.the first human is the first prophit who lived with his wife in heaven.They did a mistake so God sent them to the earth.

to know more of this,read muslim books.

 

discipleofchrist's profile pic

Posted (Answer #24)

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its very simple, genisis chapter 1 verse 1 "in the begining god created the heaven and the earth".... thats not science but it is fact.

hannacoles94's profile pic

Posted (Answer #28)

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The answer is very simple.....Jehovah.

astrosonu's profile pic

Posted (Answer #29)

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is the earth created by god

angel-girl's profile pic

Posted (Answer #30)

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I think it is through dust.

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