Biology
The nitrogen fixing bacteria present in the root nodules of leguminous plant is

Salmonella
Rhizobium
Pseudomonas
Clostridium

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Biology
Which one among the following statements is correct ?

Except the pulmonary vein, all other veins carry oxygenated blood
All veins carry oxygenated blood
Except the pulmonary artery, all other arteries carry oxygenated blood
All arteries carry oxygenated blood

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