Biology
One of the following is not a function of bones.

Production of blood corpuscles
Protection of vital organs
Secretion of hormones for calcium regulation in blood and bones
Place for muscle attachment

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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 both oxygen and carbon dioxide
Haemoglobin present in RBC can carry only oxygen but not carbon dioxide
Haemoglobin of RBC can carry only carbon dioxide

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