When oxygen is not available or is not efficient for normal respiration which uses O2 (aerobic respiration), the organism turns to mode of anaerobic respiration/fermentation that does not require O2 and is less efficient to provide energy to the organism but it still produces. That is GLUCOSE [no oxygen] —> ATP + lactic acid
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Herodotus is the best in my opinion...
the best are Roman
George washington and his troops crossed the cold water of the Delaware river
Answer: The manor system offered people protection.
Explanation: