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In cold weather, aquatic animals survive even when water to the top layer of the lake freezes into ice because
  • a)
    they can breathe in ice
  • b)
    they have enough of accumulated oxygen inside them
  • c)
    their body structure is such that they can survive without oxygen.
  • d)
    water has highest density of 4°C so underneath the top layer of ice there is layer of water
Correct answer is option 'D'. Can you explain this answer?
Verified Answer
In cold weather, aquatic animals survive even when water to the top la...
In cold countries, when the temperature of fresh water reaches 4°C, the layers of water near the top in contact with cold air continue to lose heat energy and their temperature falls below 4°C. On cooling below 4°C, these layers do not sink but may rise up as fresh water has a maximum density at 4°C. Due to this, the layer of water at 4°C remains at the bottom and above this layers of water 3°C, 2°C, 1°C and 0°C are formed. Because ice is a poor conductor of heat, it does not absorb heat energy from the water beneath the layer of ice which prevents the water freezing. Thus, aquatic creatures survive in such places.
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In cold weather, aquatic animals survive even when water to the top layer of the lake freezes into ice becausea)they can breathe in iceb)they have enough of accumulated oxygen inside themc)their body structure is such that they can survive without oxygen.d)water has highest density of 4°C so underneath the top layer of ice there is layer of waterCorrect answer is option 'D'. Can you explain this answer?
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In cold weather, aquatic animals survive even when water to the top layer of the lake freezes into ice becausea)they can breathe in iceb)they have enough of accumulated oxygen inside themc)their body structure is such that they can survive without oxygen.d)water has highest density of 4°C so underneath the top layer of ice there is layer of waterCorrect answer is option 'D'. Can you explain this answer? for UPSC 2025 is part of UPSC preparation. The Question and answers have been prepared according to the UPSC exam syllabus. Information about In cold weather, aquatic animals survive even when water to the top layer of the lake freezes into ice becausea)they can breathe in iceb)they have enough of accumulated oxygen inside themc)their body structure is such that they can survive without oxygen.d)water has highest density of 4°C so underneath the top layer of ice there is layer of waterCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for UPSC 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for In cold weather, aquatic animals survive even when water to the top layer of the lake freezes into ice becausea)they can breathe in iceb)they have enough of accumulated oxygen inside themc)their body structure is such that they can survive without oxygen.d)water has highest density of 4°C so underneath the top layer of ice there is layer of waterCorrect answer is option 'D'. Can you explain this answer?.
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