And now, I hope your next post will be about Evo.....
Cheers.
Just thinking aloud on the concept of irreducible complexity of life.
What is the least that one has to have to have life as we know it?
The simplest and first form of life would have to be a plant to photosynthesise or chemosynthesise.
Presumably, first life would be aquatic, unicellular and microscopic.
An animal cell might be simpler, but what would it eat? It is simpler having no cell wall, and no apparatus for making food. But we need to start with an autotroph.
Cyanobacteria are the simplest which fit this bill being prokaryotic and not having the full complement of cell organelles.
But even bacteria are too complicated. So let's think simpler still.
The simplest life would have to have a membrane on the outside to define it, and to keep what sustains life in, and what harms life out.
The simplest cell membranes today all consist of two layers of lip-protein adding up to a protein-lipid-lipid-protein layer.
These require energy to transport substances actively into the cell.
We could go with a simpler fatty acid membrane which would passively allow substances into the cell under specific circumstances, but this would be very unlikely to go anywhere. And these could only exist in very specific locations such as around thermal vents. Around thermal vents, apparently fatty acids can form from hydrocarbons and carbon monoxide. But having a passive membrane will not get us very far.
http://exploringorigins.org/fattyacids.html
Life defies the second law of thermodynamics, and to do so it needs a source of energy to go from less organised to more organised. We need a source of energy within the cell.
Currently, most life is powered by ATP. In most cells the simplest way to get energy (ATP) is through glycolysis which occurs in the cytoplasm. ATP is more efficiently produced in the mitochondria. And evolutionists speculate that bacteria evolved into mitochondria, when eukaryotic proto-cells fused with with bacteria. Mitochondria still have the DNA left over from their bacterial ancestry, according to evolution.
http://www.madsci.org/posts/archives/2001-06/993493803.Cb.r.html
But there may be an even simpler form of energy - proton power. This drives the flagellae of some bacteria. Proton power actually is at the basis of ATP formation in mitochondria. Protons are actively pumped across the inner folded membrane inside the mitochondrion to charge or discharge the energy in ATP.
Next we come to the DNA-protein argument which is a chicken-egg one. You need the one to make the other. Some speculate that early life was RNA based but an RNA world goes nowhere apparently.
http://www.d.umn.edu/~pschoff/documents/OrgelRNAWorld.pdf
The making of proteins by DNA takes energy. Once proteins are made, these can be incorporated into the cell membrane where they can start taking in substances actively.
Chemosynthesis, where bacteria live off chemicals like methane or sulphur, would be the simplest source of energy. With a membrane selectively taking in chemicals, this could presumably occur.