Biology
Osmosis is the flow of solution from higher concentration to a solution of lower concentration through a semi permeable membrane. What is incorrect in this statement?

Exact concentration of solution is not given
Character of semi permeable membrane is not given
The flow of solution is not possible through semi permeable membrane
All are incorrect

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Biology
Which one of the following statements regarding haemoglobin is correct?

Haemoglobin is only used for blood clotting and not for carrying gases
Haemoglobin of RBC can carry only carbon dioxide
Haemoglobin present in RBC can carry only oxygen but not carbon dioxide
Haemoglobin of RBC can carry both oxygen and carbon dioxide

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