tubi417 writes:
Alright lets pretend that somehow a cell was formed in a primative ocean.
Let me outline our current generally accepted abiogenesis model.
quote:
Stage 1 Abiotic synthesis of organic monomers.
We know for a fact that organic molecules form natrually rather easily under certain condition. This was demonstrated by the Miller experiment in the early 50's. He basically created an enclosed apparatus and he put inside water, hydrogen gas, carbon dioxide, nitrogen, and a whole bunch of other non-organic molecules that thought to have existed in early earth environment. He then zapped the apparatus with electricity for about 3-4 days. He then took the apparatus apart and found amino acids, monomers of proteins, ATP, and a whole bunch of other organic molecules.
Repeats of the orginal experiment by other scientists have produced all 20 amino acids necessary for life, lipids, sugars, nucleotides of monomers of DNA and RNA, and ATP.
Stage 2 Abiotic Synthesis of polymers
The miller experiment have shown that organic monomers can form quite easily naturally without any divine intervention. This stage explains how these monomers could come together and form polymers such as proteins and nucleic acids without help from biological components today like enzymes.
Scientists have been able to create such polymerization without any divine intervention by dripping solutions of organic monomers onto hot sand, rock, and clay. The heat vaporizes the water in the solutions and the monomres naturally establish bonds that form polymers such as chains of amino acids that make up proteins.
The hypothesis goes that water may have splashed the monomers onto hot rocks of early earth and natural processes pretty much took care of the rest.
Stage 3 Self replicating molecules
The hypothesis suggests that the first replicating organic material were short strands of RNA. Laboratory experiments have shown that nucleotide monomers can naturally assemble into RNA molecules without divine intervention. This process happens without the presence of cells or enzymes. As you can imagine, the result is a pool of RNA strands. Now, what scientists have also observed is that some of these RNA strands actually self replicate without any help from anything whatsoever.
Stage 4 Assembly of pre-cells
Again, laboratory experiments have shown that lipids can fold and establish a self-contained environment in the center from the environment.
For those of you that doesn't know what a cell structure look like, here is a brief explantion. A prokaryotic cell contains a cell wall that isolate the inside from the outside environment.
A pre-cell is pretty much very similar to this structural design. Lipids could have curved in itself and isolate a small pocket of envirnment in the center. When scientists put the pre-cells (which assembled without any help from anybody) into different solutions of salt concentrations, they found that pre-cells store energy in a form of voltage in their membrane (the cell wall equivalent). When introduced certain enzymes to the pre-cells, the precells displayed a very primitive metabolism. They absorbed substratesfrom their surroundings and release the products of the reactions.
Lets say that this cell somehow because of "chemicals" has all the necessary organelles(and the chances of this happening are.......).
What the heck are you talking about? Many many many things today don't have any organelle at all. Why demand that the first life must have all organelles?
The first life you think would be pretty fragile, yet because there had to have been no oxygen in the atmosphere there obviously would NOT be an ozone layer.
According to our currently accepted model, the first life started in the ocean. Plenty of protection there.
Without an ozone layer this cell would receive heavy doses radiation from the sun- obviously this would kill it.
There is also another possibility. We
think that the first life on earth were actually the archaea domain. They are extreme bacteria living in extreme areas, like hyperthermal vents deep in the ocean that sometimes get hotter than a hundred degrees, volcanically active regions, deep below the earth's surface where there's no sunlight and the bacteria are dependent on non-organic minerals only, and the polar ice caps.
Who knows? For all we know, there once could have existed a form of life that could withstand that much solar radiation.
Lets say that it magically survives and somehow this cell mutated so that it magically mastered many essential life process-for example-
Again, you are making an unfounded assertion. In order for something to be alive, it has to have the essential processes that life possess, such as a metabolism. Otherwise, it's not alive.
Protein Synthesis- It had to have a mutation that would create mRNA and somehow a mutation to get it to the right place and somehow another mutation for the tRNA to develope and so on. If one of these "mutations" that created the process of protein synthesis was wrong- lets say the tRNA was brought to the vacuole- the cell DOES NOT survive.
You are describing a eukaryotic cell. The first life on earth were prokariotes.
Somehow this cell also had a mutation that caused it to be able to reproduce asexually- if it didn't have this mutation- we wouldn't be here right now.
If it can't produce, it's not alive. Therefore, it was a given in the first place.
In some experiments, precells have been known to divide through fusion. There is no reason to believe that the first cells couldn't reproduce the same way.
Lets say that chemicals in this primitive ocean make millions and millions of cells complete with all organelles- NOT from asexual reproduction but because of some kinda chemical reaction.
What the fuck are you talking? This assertion doesn't even begin to make any sense.
How likely is it that one of these cells is going to have a mutation for the process of protein synthesis? A mutation that would create anything beneficial to the cell? If any of these cells had a mutation they would probably die.
If you go back and start making sense of yourself, we can go on to this point. Before then, I don't think any explanation we have can help. If you want to have a steak for dinner, you must first realize that you have to go out to the supermarket to get some meat. Can't make a steak by just assuming that it will already be on the table waiting for you to devour it. Get my drift?
The Laminator
Somehow, I have completely missed this possibility.
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