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Marine upwelling zones have high biological productivity. This is because
1. They are good fishing grounds.
2. Upwelling brings oxygen rich water to the surface.
3. Upwelling brings nutrient rich water to the surface.
Select the correct answer using the codes given below.
1 and 2
1 and 3
3 only
1, 2 and 3
3rd statement is correct. Marine upwelling zones have high biological productivity. This is because upwelling brings nutrient rich water to the surface.
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