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Question
The force of cohesion tension exceeds root pressure on a
The force of cohesion tension exceeds root pressure on a
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Solution
The correct option is B Sunny day
The force of cohesion-tension exceeds root pressure on a sunny day because on a sunny day the rate of transpiration is high. Root pressure is a hydrostatic pressure in the roots due to which water is transported upward, through the stem. During transpiration, the water is lost from guard cell which leads creates a negative or suction pressure or tension in the leaves. Due to this, the water is pulled water upwards. The water molecules adhere to each other and the xylem walls. Thus, this increases the rate of transpiration. So, the correct answer is option C.
The force of cohesion-tension exceeds root pressure on a sunny day because on a sunny day the rate of transpiration is high. Root pressure is a hydrostatic pressure in the roots due to which water is transported upward, through the stem. During transpiration, the water is lost from guard cell which leads creates a negative or suction pressure or tension in the leaves. Due to this, the water is pulled water upwards. The water molecules adhere to each other and the xylem walls. Thus, this increases the rate of transpiration.
So, the correct answer is option C.
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