Ans of que no.38?

Ans of que no.38? (3) Bile duct and oesophagus (4) Fallopian tubes and urethra OQ38. A large proportion of oxygen is left unused in the human blood even after its uptake by the body tissues. This 02 : (1) acts as a reserve during muscular exercise (2) raise the pC02 of blood to 75 mm of Hg. (3) is enough to keep oxyhaemoglobin saturation at 96% (4) helps in releasing more 02 to the epithelial tissues. Q39. An organism used as a biofertilizer for g sovabean crops is :

1st option
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