Biology
Which of the following acts as an insulator against heat, cold and as a shock-absorber in the body ?

Subcutaneous fat layer
Epidermis
Dermis
None of these

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Biology
Normal adult human male has

18 gram of haemoglobin/100 gram of blood
24 gram of haemoglobin/100 gram of blood
14 gram of haemoglobin/100 gram of blood
10 gram of haemoglobin/100 gram of blood

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