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1.But there was still a very different physiological challenge for these organisms than for the more evolutionarily ancient single-celled organisms such as bacteria.
2.this mechanism is present in multi-cellular animals, but not in the single-celled organisms that were the precursors of animals, suggesting that the mechanism evolved at the same time as the earliest multicellular animals.
3.Defects in the most important human oxygen sensing enzyme can cause polycythemia .

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lgs1(½ð±Ò+2): лл 2011-02-16 15:46:20
2.this mechanism is present in multi-cellular animals, but not in the single-celled organisms that were the precursors of animals, suggesting that the mechanism evolved at the same time as the earliest multicellular animals.
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lgs1(½ð±Ò+5, ·­ÒëEPI+1): лл 2011-02-16 15:46:08
1.But there was still a very different physiological challenge for these organisms than for the more evolutionarily ancient single-celled organisms such as bacteria.

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lgs1(½ð±Ò+2): лл 2011-02-16 15:46:28
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lgs1(½ð±Ò+1): лл 2011-02-16 15:46:39
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