T
The_Barbarian
Guest
Barbarian observes:
Strike one. Back then, it was hypothesized by most biologists, (including Darwin) that a living fluid might be possible.
David isn’t much of an “evolutionary scholar” if he isn’t familiar with the eozoon issue.
Strike two. The simplest form of life is in fact, a single-celled organism. Chemistry had to start with atoms, because early chemists had no explanation for the way atoms formed. No one with any sense thinks this reflects poorly on chemistry or biology.
Nope. You’re just flat out wrong. Unicellular organisms include the simplest of living things. That’s a fact.
See above. You’ve been misled by someone who knew no more than you do.
Strike three. There is considerable evidence for abiogenesis, although it’s not yet settled. Would you like to learn about it?
Calm yourself. We’ll show you in just a bit.
Let’s take a look at Wiki, then…
**The RNA world is proposed to have evolved into the DNA and protein world of today. DNA, through its greater chemical stability, took over the role of data storage while protein, which is more flexible in catalysis through the great variety of amino acids, became the specialized catalytic molecules. The RNA world hypothesis suggests that RNA in modern cells, in particular rRNA (RNA in the ribosome which catalyzes protein production), is the evolutionary remnant of the RNA world…Among the enzymatic properties important for the beginning of life are:
Code:
* The ability to self-duplicate, or duplicate other RNA molecules. Relatively short RNA molecules that can duplicate others have been artificially produced in the lab. The shortest was 165-base long, though it has been estimated that only part of the bases were crucial for this function. One version, 189-base long, had fidelity of 98.9% [5], which would mean it would make an exact copy of an RNA molecule as long as itself in one of every eight copies. This 189 base pair ribozyme could polymerize a template of at most 14 nucleotides in length, which is too short for replication, but a promising lead for further investigation. The longest primer extension by a ribozyme polymerase was 20 bases.[6]
* The ability to catalyze simple chemical reactions which would enhance the creation of molecules which are building blocks of RNA molecules—i.e., a strand of RNA which would make creating more strands of RNA easier. Relatively short RNA molecules with such abilities have been artificially formed in the lab.[7][8]
* The ability to catalyse the formation of peptide bonds, in order to produce short peptides, or—eventually—full proteins. This is done in modern cells by ribosomes, a complex of two large RNA molecules known as rRNA and many proteins. The two rRNA molecules are thought to be responsible for its enzymatic activity. A much shorter RNA molecule has been formed in lab with the ability to form peptide bonds, and it has been suggested that rRNA has evolved from a similar molecule.[9] It has also been suggested that amino acids may have initially been complexed with RNA molecules as cofactors enhancing or diversifying their enzymatic capabilities, before evolving to the more complex peptides. mRNA may have evolved from such RNA molecules, and tRNA from RNA molecules which had catalyzed amino acid transfer to them.[10]**