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Wed, 03 Nov 2004 16:50:07 +0000 Dan Holdsworth wrote:
As far can be told, the first bacteria did not use light in their reactions, and were effectively entirely "rockeaters". Then at some point a strain evolved that could combine elemental sulphur and hydrogen from the atmosphere to produce energy, albeit inefficiently. So tell me, do the Rockeaters and the Strain-Rockeaters mentioned need each other in order to live, survive and thrive? The big breakthrough came when a variant on this strain started to use light to push the reaction in the other direction: it took the then fairly abundant hydrogen sulphide and produced elemental sulphur and hydrogen. Same question, do the light-variant H2, S need the reverse strain co-existing in the environment? Neither of these bacterial types altered the atmosphere much, however. That came with a small mutation in the genes that coded for the H2S splitting enzyme. The mutant form split water instead of hydrogen sulphide. This produces That poses a question as to how much of a interrelation is water to hydrogen sulphide for the Rockeaters and strains as they produce energy. I guess I am asking whether you can have Rockeaters in dry rock conditions. So could you have Rockeaters on the Moon where there is little to no water. So how much water does any Rockeater need to have interfacing in order to use hydrogen sulfur? oxygen, which was then rather troublesome for the bacteria since everything alive then was poisoned by oxygen. Gradually a more tolerant strain evolved, and true plant-like behaviour took over. The oxygen So the question here becomes as a mirror image of the above only instead of revolving around hydrogen sulphur it revolves around CO2 and O2. If the Rockeaters of hydrogen-sulfur have variants that go reverse, implies then that animals to plants is the reverse for carbon-oxygen gas levels at first stayed low through weathering of rocks and iron minerals, then eventually took off exponentially. The relevent point here is, where do you draw the line? What IS a plant? The hydrogen sulphide reducers are acting like plants, but the compounds they're reducing are rock-derived. I was focused on Plant Kingdom to Animal Kingdom but perhaps that should not have been my focus but rather instead a focus on energy pathways of gases or elemental compounds and that these special pathways have dual reverses where one creature species will emerge to use one direction of hydrogen and sulfur and another creature species will emerge to use the reverse pathway. And that somehow both creature species needs the other in order to live and thrive but how they "necessarily need" one another is unclear. The relationship of plants to animals today is that animals depend on plants for food but plants depend on animals for fertilizer. So I need a relationship between blue green algae and some other organism. How's about a relation between photosynthetic predatory protozoa and other photosynthetic predatory protozoa? Down at the microscopic level, with bacteria and protozoa, the plant/animal dividing line is extremely blurred. An organism might one day be wholly photosynthetic; it might the next be 50/50 photosynthetic/predatory; it might then become a predator for a brief while. Maybe I need to focus more on energy pathways such as hydrogen-sulfur or carbon-oxygen and see if there are two creature species always present when such an energy pathway exists and whether both species are vital to one another for each to live and thrive. Archimedes Plutonium www.iw.net/~a_plutonium whole entire Universe is just one big atom where dots of the electron-dot-cloud are galaxies |
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