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Amphibians have been able to maintain a specific level of hydration...
Wednesday 9 November 2016, by
Amphibians have been able to maintain a specific level of hydration in and out of water ever since they developed neurohypophysial hormones which adjusted the permeability of their skin. A) which adjusted B) that adjusts C) which has adjusted D) that has been adjusting E) having adjusted (...)
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