Biology
Placenta is the structure formed

by the union of foetal and uterine tissue
by foetus only
None of these
by fusion of germ layers

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

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

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