The percentage of fresh water on earth is
Correct answer: A. 1%
- A. 1%
- B. 3%
- C. 5%
- D. 7%
Explanation
Water is the most important renewable resource of environment.Water covers about 70% of the surface of earth.It is the major constituent of the protoplasm of organism.Sea water constitute 97% of the total water which is not usable,2% is in frozen form and only 1% of water is available as freshwater (lakes,streams and rivers).
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About Homeostasis
Homeostasis maintains a stable internal environment through the kidney and urinary system, thermoregulation and excretion. The kidney topics include filtration, selective reabsorption, urine formation and water balance, while thermoregulation involves sweating, vasodilation, vasoconstriction and hormonal control; excretion is different from egestion, which removes undigested food.
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