How does transpiration help water rise in a plant?
Answer and explanation
Correct answer: Loss of water vapour from leaves creates a pull
The governing concept is transpiration pull, supported by cohesion between water molecules and adhesion to xylem walls. When water vapour escapes through stomata, the water level in leaf tissues falls and tension develops in the continuous xylem column. This tension pulls water upward from the roots, helping replace the lost water. Hence option A is correct; phloem transports food, and the other choices are biologically unrelated.
Frequently asked questions
What is the correct answer to this question?
Loss of water vapour from leaves creates a pull
Why is this the correct answer?
The governing concept is transpiration pull, supported by cohesion between water molecules and adhesion to xylem walls. When water vapour escapes through stomata, the water level in leaf tissues falls and tension develops in the continuous xylem column. This tension pulls water upward from the roots, helping replace the lost water. Hence option A is correct; phloem transports food, and the other choices are biologically unrelated.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: World of Living. Topic: Life Processes.
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