Darwins proposed theory is the survival of the fittest.
<span>The person can prepare by eating the right food, exercise, hydration of self and condition oneself for the incoming adventure like extreme. And also the human body systems respond to changes in the external environment, the nervous system and hormones enable us to respond to external changes. </span>
Gaseous exchange is fundamental in aerobic organisms because oxygen is required to carry out cellular respiration.
<h3>What is cellular respiration?</h3>
Cellular respiration is a series of chemical reactions by which aerobic organisms interchange oxygen and carbon dioxide with their surrounding environment.
During cellular respiration, oxygen is consumed to generate ATP and carbon dioxide is released.
In conclusion, gaseous exchange is fundamental in aerobic organisms because oxygen is required to carry out cellular respiration.
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If the water is initially hot, cooled water at the bottom is denser than the hot water at the top, so no convection will occur and the bottom part will start freezing while the top is still warm. This effect, combined with the evaporation effect, may make hot water freeze faster than cold water in some cases.
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