About __________ of the body weight of a mammal is water ?
Correct answer: C. 70%
- A. 60%
- B. 65%
- C. 70%
- D. 75%
Explanation
Water commonly makes up about 70% of the body mass of a mammal, although the exact percentage varies with age, tissue type, and species. Students may choose 60% because it is a commonly quoted approximate value for some adults, but the standard textbook value here is 70%.
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About Biological Importance of Water
Water supports life through its polarity, hydrogen bonding and ability to dissolve ionic and polar substances. Its high specific heat, heat of vaporization, cohesion, adhesion and incompressibility help regulate temperature, transport materials and maintain structure, while hydrolysis and osmosis depend directly on water.
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