When games and competitions are held at high altitudes, athletes must specially train to postpone their cells from switching to

anaerobic cellular respiration

Explanation:

Given that anaerobic cellular respiration does not require oxygen, and when games and competitions are held at high altitudes, the human body system ATP demands exceed the available oxygen.

Hence, to cope and survive in this situation, the athletes must specially train to postpone their cells from switching to anaerobic cellular respiration. This helps the athletes to last longer and withstand the temperature.

for  example, forests have higher evapotranspiration than other ecosystems,  such  as grasslands, because of their deeper roots and greater leaf area. thus forests have a net moistening effect on the atmosphere and become a moisture source for downwind ecosystems.

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