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Question 34
Animals in cold regions and fish in cold water have a thicker layer of subcutaneous fat under their skin. Justify.


Solution

Animals in cold regions and fish in cold water have thicker layer of subcutaneous fat because fat acts as subcutaneous insulation to regulate body- heat. Subcutaneous fat functions as insulating layer that prevents heat loss from the body in colder environments, thus enabling them to survive adverse conditions. Fat also functions as a reserve energy source during periods of scarcity of food.


Biology
NCERT Exemplar
Standard IX

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