Term
| What was probably the first form of life? |
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Definition
| Hyperthermophillic chemosynthetic bacteria |
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Term
| describe hyperthermophollic chemosythetic bacteria |
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Definition
| created along deep sea vents; becuase photsynthsis is not possible it used chemosynthesis or the extraction of chemical energy |
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Term
| How does chemosynthesis work |
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Definition
| when hydrogen sulfide rises from the deep sea vents it reacts with other elemets and releases 2 electrons that provide chemical energy |
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Term
| What was the second form of life? |
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Definition
| Methanogenic chemosynthetic bacteria, slightly further along the archae domain the earlier ones were thermophillic the alter ones probably adapted to new enviorments |
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Term
| how did methanogenic chemosythetic bacteria live |
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Definition
| deep sea vents were a source of carbon dioxide and hydrogen these reactions gave them energy and had huge methan by products there might ahve been a methan haze aroune 2.7 BYA like titan |
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Term
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Definition
| it evolved from the domain bacteria not archae and appear to have evolved from hyper themohilic bactera; they are blue green ifferent collors occur because different ratios of chlorophyll and carotenoids |
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Term
| WHEN DID BACTERIA BECOME PHOTOSYNTHETIC? |
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Definition
| THE FIRST 2 BACTERIA WERE CHEMOSYNTHTIC AND RELEASED O2 BUT IN SMALL AMOUNTS AND THE OTHER RELEASED METHAN HOWEVEY CYANOBACTERIA BEING PHOTOSYNTHETIC OCCURS MORE PLACES CREATING MORE 02 IN THE ATMOSPHERE |
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Term
| WHATS THE DIFFERENCE BETWEEN TODAYS AND EARLY STROMATILITE |
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Definition
| TODAY THEY ARE PHOTSYNTHETIC THEY WERE PERHAPS CHEMOSYNTHETIC IN THE EARLY DAYS AND MORE LIKELY MEHTHANOGENIC |
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Term
| WHAT IS THE DIFFERENCE BETWEEN FERROUS IRON AND FERRIC IRON? |
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Definition
| FERRIS IS fE2 AND fEERRIC IS fE3 BEING REACTED WITH OXYGEN |
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Term
| DESCRIBE BANDID IRON FORMATIONS |
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Definition
| WHEN FE2 REACHES THE OCEAN THIS MEANS THERE WAS LITTLE OXYGEN IN THE ATMOSPHERE IF THERE WAS MUCH OXYGEN FE3 WOULD HAVE FORMED AND STAYED ON LAND |
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Term
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Definition
| THESE FORMED AROUND 2.2 BYA |
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Term
| WHEN WAS ATMOSPHERIC OXYGEN LEVELS LOW OR HIGH? |
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Definition
| THEY WERE LOW BEFORE 2.2 BYA AND HIGH SINCE 1.9 BYA |
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Term
| WHAT DELAYED OXYGEN FROM 2.2 TO 2.7 BYA |
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Definition
| THIS COULD HAVE BEEN CAUSED FROM HIGH LEVELS OF HYDROGEN SO EVENT EH PHOTOSYNTHETIC BACERIA COULDNT HELP MUCH UNTIL IT REACTED WITH THE HYDROGEN IN COMBINATION WITH PHOTOLYSIS TO RELEASE HYDROGEN FROM THE ATMOSPHERE INTO SPACE THIS IS MOST LIEKLY FOR THAT 500 MILLION YEAR GAP |
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