OBJECTIVE LIFE SCIENCE
CELL BIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Water absorbs heat when it evaporates and forms a gas
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Water expands and becomes less dense when it freezes
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Water molecules completely separate into ions in solutions
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Water forms hydrogen bonds with ions and other polar substances
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Detailed explanation-1: -Many fish and aquatic plants can survive a cold winter because the layer of ice that forms at the top of the lake insulates the water below and prevents the lake from freezing solid. What unique property of water contributes to this effect? Water expands and becomes less dense when it freezes.
Detailed explanation-2: -Due to its high heat capacity, water is used by warm blooded animals to more evenly disperse heat in their bodies; it acts in a similar manner to a car’s cooling system, transporting heat from warm places to cool places, causing the body to maintain a more even temperature.
Detailed explanation-3: -Capillary action helps bring water up into the roots. With the help of adhesion and cohesion, water can work it’s way all the way up to the branches and leaves.