Question

Which is the major driving force in the movement of water in xylem (i) at night (ii) during day?

Answer 1

Transpiration pull helps in the movement of water duing the day in the xylem vessel. Answer: During the day transpiration helps inn the movement of water and during night, the pressure inside the roots helps in water transportation in xylem.

Answer 2

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$Transpiration\:pull\:is\:the\:major\: driving\: force\:in\:the\: movement\:of\:water\:in\:xylem$

$\: during\:day\:time\:and\:root\: pressure\:is\:the\:major\: driving\: force\:in\:the\: movement$

$\:of\:water\:in\:xylem\: during\:night\:time$