EVERYDAY SCIENCE

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SCIENCE

CELL BIOLOGY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
An individual cell of an entire multicellular organism may be between 70% to 90% water; moreover, cells and organisms resist rapid temperature change and maintain homeostasis. This important characteristic is based on what property of water?
A
One water molecule can covalently bond to another water molecule
B
The strong ionic bonds between water molecules
C
The low vaporization of water
D
The high heat capacity of water
Explanation: 

Detailed explanation-1: -Heat of vaporization is the amount of energy required to convert liquid into gas. This property helps humans maintain homeostasis of body temperature by evaporation.

Detailed explanation-2: -As the water evaporates, energy is taken up by the process, cooling the environment where the evaporation is taking place. In many living organisms, including in humans, the evaporation of sweat, which is 90 percent water, allows the organism to cool so that homeostasis of body temperature can be maintained.

Detailed explanation-3: -Water has the unique ability to dissolve many polar and ionic substances. This is important to all living things because, as water travels through the water cycle, it takes many valuable nutrients along with it! Water has high heat capacity.

Detailed explanation-4: -One property is cohesion, the tendency for water molecules to stick together. The cohesive forces between water molecules are responsible for the phenomenon known as surface tension.

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