Biology
Normal adult human male has

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

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Biology
Plants are killed in winter by frost

because there is no transpiration
because respiration ceases at such low temperature
because of desiccation and mechanical damage to the tissues
because no photosynthesis takes place at such low temperature

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