Where Did the First Living Cell Come From?
In order for the principles of mutation and natural selection in the theory of evolution to work, there have to be living things for them to work on. Life must exist before it can to start diversifying. Life had to come from somewhere, and the theory of evolution proposes that it arose spontaneously out of the inert chemicals of planet Earth perhaps 4 billion years ago.
Could life arise spontaneously? If you read How Cells Work, you can see that even a primitive cell like an E. coli bacteria — one of the simplest life forms in existence today — is amazingly complex. Following the E. coli model, a cell would have to contain at an absolute minimum:
A cell wall of some sort to contain the cell
A genetic blueprint for the cell (in the form of DNA)
An enzyme capable of copying information out of the genetic blueprint to manufacture new proteins and enzymes
An enzyme capable of manufacturing new enzymes, along with all of the building blocks for those enzymes
An enzyme that can build cell walls
An enzyme able to copy the genetic material in preparation for cell splitting (reproduction)
An enzyme or enzymes able to take care of all of the other operations of splitting one cell into two to implement reproduction (For example, something has to get the second copy of the genetic material separated from the first, and then the cell wall has to split and seal over in the two new cells.)
Enzymes able to manufacture energy molecules to power all of the previously mentioned enzymes
Obviously, the E. coli cell itself is the product of billions of years of evolution, so it is complex and intricate — much more complex than the first living cells. Even so, the first living cells had to possess:
A cell wall
The ability to maintain and expand the cell wall (grow)
The ability to process “food” (other molecules floating outside the cell) to create energy
The ability to split itself to reproduce
Otherwise, it is not really a cell and it is not really alive.
so where did it come from? proof please, thanks
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