posted on Mar, 11 2012 @ 04:42 PM
Abiogenesis or biopoiesis is the study of how biological life could arise from inorganic matter through natural processes. In particular, the term
usually refers to the processes by which life on Earth may have arisen.
Most amino acids, often called "the building blocks of life", can form via natural chemical reactions unrelated to life, as demonstrated in the
Miller–Urey experiment and similar experiments that involved simulating some of the hypothetical conditions of the early Earth in a laboratory.
Other equally fundamental biochemicals, such as nucleotides and saccharides can arise in similar ways. In all living things, these biochemicals are
organized into more complex molecules, including macromolecules, such as proteins, polysaccharides, and nucleic acids. These three molecules are
essential for all life functions and make up all living organisms. The construction of these macromolecules is mediated by nucleic acids and enzymes,
that are themselves synthesized through biochemical pathways catalysed largely by proteins. Which of these various classes of organic molecules first
arose, and how they formed the first life, is a major topic in the discipline of abiogenesis.
In any theory of abiogenesis, two aspects of life must be accounted for: replication and metabolism. The question of which came first gave rise to
different types of theories. In the beginning, metabolism-first theories were proposed, and only later thinking gave rise to the modern,
replication-first approach. The sequence of chemical events that led to the first nucleic acids is not known. Several hypotheses about early life have
been proposed, most notably the iron-sulfur world theory and the RNA world hypothesis.
The first living things on Earth are thought to have been single cell prokaryotes (which lack a cell nucleus), perhaps evolved from protobionts
(organic molecules surrounded by a membrane-like structure).
The oldest ancient fossil microbe-like objects are dated to be 3.5 Ga (billion years old), approximately one billion years after the formation of the
Earth itself with reliable fossil evidence of the first life found in rocks 3.4 Gyr old.
By 2.4 Ga, the ratio of stable isotopes of carbon, iron and sulfur shows the action of living things on inorganic minerals and sediments and molecular
biomarkers indicate photosynthesis, demonstrating that life on Earth was widespread by this time.
Personally, I prefer Genesis...the more succinct explanation and it says the exact same thing.
Disproving the Genesis account is the equivalent to disproving what any Biology book would have to say concerning the subject.
Good Luck, OP.