BIOCHEMISTRY
PROPERTIES OF WATER
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
gravity pushes the water molecules up
|
|
|
evaporation at the leaves “pulls” on the water.
|
|
|
water’s magnetic properties causes it to “pull” towards the leaves.
|
|
|
capillary action pulls the water molecules up like a chain.
|
Detailed explanation-1: -Capillary action helps bring water up into the roots. But capillary action can only “pull” water up a small distance, after which it cannot overcome gravity. To get water up to all the branches and leaves, the forces of adhesion and cohesion go to work in the plant’s xylem to move water to the furthest leaf.
Detailed explanation-2: -As transpiration occurs, it deepens the meniscus of water in the leaf, creating negative pressure (also called tension or suction). The tension created by transpiration “pulls” water in the plant xylem, drawing the water upward in much the same way that you draw water upward when you suck on a straw.
Detailed explanation-3: -The suction force (negative pressure) created by transpiration from the leaves’ surface draws water from the soil and roots through the xylem. Water is sucked up as a result of the xylem vessel. Due to the appearance of capillary action, transpirational pull moves water from roots to leaves.
Detailed explanation-4: -Water tends to rise up inside the narrow tubes by capillary action. This is because of an attraction of water molecules to each other by a week electrostatic force.