October 15, 2003 - Origin of Life (cont. from notebook)

October 15, 2003 - Origin of Life (cont. from notebook) -...

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I. Origin of Life a. Big Bang Theory i. Look in notebook b. History or thinking i. Evidence we’re finding might actually substantiate these wacky ideas ii. Ideas 1. Panspernia a. 1800’s b. accepted by scientists as well as c. spores of life came from some other part of the universe i. organic material being located at meteor strikes on the earth 2. Directed Panspernia a. Krick and Origia (other guy, don’t know his name) b. Spores sent by some other sentient beings out in the universe 3. Created a. By a supreme being 4. Abiogenesis a. “Without life beginning” i. beginning of life where there was none b. “spontaneous generation” i. examples of how it could have been believed 1. been around for centuries 2. birds emerging from the mud a. story b. fishing 3. Pantry jar, top falls off a. bottom has a small mouse i. combo of dark pantry ii. clothes iii. wheat kernels iv. spontaneously created mouse ii. Louis Plasteur 1. Proved that bacteria did not spontaneously generate from stew c. Occurred i. 4.6 billion years ago ii. any number of times 1. not just once 2. but probably more than once
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a. appeared and died out repeatably 3. one time must have occurred when life was able to take hold and survive iii. Earth was quite chaotic 1. meteors, fissures, steam, et cetera 2. “Life arose under the hellish skies of a planet enrapped by volcanic eruptions and with meteors falling from the skies” Time Magazine (about correct) iv. Reducing atmosphere 1. in contrast to ours that has a large omount of oxygen a. Oxegenated atmosphere now 2. Hydrogen atmosphere first a. Probably escaped 3. new atmosphere appeared about the same time from the earth itself a. Like Old Faithful b. A million fold all over the earth c. Water Vapor d. Carbon monoxide e. “ dioxide f. Nitrogen g. Methane h. Ammonia v. Stanley Miller 1. utilized methane and ammonia 2. Life based on carbon and polymers a. Large chains that can form vi. As earth began to cool 1. condense the water vapor in atmosphere a. formed torrential rains and vicious storms for hundreds of millions of years b. Oceans 2. Energy will appear a. Lightening b. Heat in volcanoes or vents c. Ultraviolet radiation vii. 1920’s 1. two scientists independently made similar hypthesis
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J.B.S. Hal Dane b. Alexander Oparin 2. long period of biochemical synthesis a. 1 to three billion years b. viii. filaments 1. spherical filaments bacterial forms oldest form of life about 3.5 billion years ago 2. Stromatilites a. Fossilized indicators of the bacterial b. Rock formation c. Found in Shark Bay in Australia d. Domed shaped, some larger, of course e. If you cut through to look inside i. Configuration are banded domes of sediment ii. Lines run through the rocks iii. We think that this shows the activity of the bacterial forms f. Also found in Africa and other places g. P. 488 i. Picking up glob of algae and bacteria ix. Prokaryotic 1. first nucleus x. Eukaryotic 1. true nucleus xi. Euglena 1. flagellum a. uses to propel b. must be an animal
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This note was uploaded on 10/12/2011 for the course BIOLOGY 100 taught by Professor Smith during the Spring '11 term at South Carolina Upstate.

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October 15, 2003 - Origin of Life (cont. from notebook) -...

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