ABBGuiding+questions+for+reading5

ABBGuiding+questions+for+reading5 - Guiding questions...

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Unformatted text preview: Guiding questions for reading 5: The hydrogen hypothesis Prepare a synopsis of the article (typed, double-spaced, < 500 words). Within the synopsis, answer the following questions. This synopsis is due at the beginning of discussion. 1) Why do the two proposed symbiotic partners initially pair up? In other words, what, if anything, does each partner get out of the relationship? 2) The mitochondrial ancestor “handed over” many of its genes to the surrounding methanogenic symbiont. Does the author suggest that there any advantage to doing this? In other words, did this improve the symbiotic relationship? 3) Bacterial life evolved very quickly- very soon (a few hundred million years) after the appearance of liquid water on earth. But eukaryotic life was slow to appear- it required about another billion and a half years. Why this long delay? 4) The Hydrogen Hypothesis suggests that the H2-producing ancestor of the mitochondrion was “metabolically sophisticated”- capable of both aerobic and anaerobic metabolism. What, if any, evidence supports this notion? ...
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