1.

If the humidity of the atmosphere suddenly increases substantially, the water flow in the xylem will -(A)  increase(B)  decrease(C)  remain unaltered(D)  increase sharply and then reduce slowly to the preexisting level 

Answer»

Correct option  (B) decrease

Explanation:

Humidity of atmosphere is inversely proportional to transpiration (water flow). Increase in humidity will decrease the water flow in the xylem. 



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