Home / Unit-8 Plant Physiology / Question
MCQ
In the cohesion-tension theory, the transpiration pull is transmitted down the xylem mainly because?
Unit-8 Plant Physiology
A Water molecules cohere to each other and adhere to xylem walls
B Air bubbles carry water downward
C Phloem pressure pushes water up
D Root hairs actively pump water upward
Explanation

Cohesive forces between water molecules and adhesion to the xylem walls keep a continuous water column.

Related MCQs

Guttation is the loss of water in liquid form through?
Unit-8 Plant Physiology View
Plants store some waste materials in?
Unit-8 Plant Physiology View
At night, when most stomata are closed, plants?
Unit-8 Plant Physiology View
Which gas is released during respiration in plants?
Unit-8 Plant Physiology View
Guttation mainly occurs when?
Unit-8 Plant Physiology View
What creates the pull in the cohesion-tension mechanism?
Unit-8 Plant Physiology View