AP BIOLOGY

BIOCHEMISTRY

PROPERTIES OF WATER

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Water travels up from the roots of a tree to the top because of
A
adhesion and cohesion
B
surface tension
C
specific heat capacity
D
density of water compared to ice
Explanation: 

Detailed explanation-1: -Capillary action helps bring water up into the roots. With the help of adhesion and cohesion, water can work it’s way all the way up to the branches and leaves.

Detailed explanation-2: -The attraction to the tree root tissue (cohesion) becomes stronger than the attraction to the other water molecules (adhesion). This sends the water drop up through the roots of the tree in narrow pipes called capillaries or xylem.

Detailed explanation-3: -The cohesive forces present between the water molecules keeps them together and provides stability to them. The adhesive forces help the water molecules to stick to other surfaces like glasses, leaves, or any other plant surfaces. The water molecules stick to these surfaces and thus do not runoff.

Detailed explanation-4: -Water molecules are bent so the hydrogen atoms are to one side of the oxygen atom. and when it come to molecules opposites attract. A bond forms between the negative side of one water molecule and the positive side of another. At that is what gives water its stickiness.

Detailed explanation-5: -The properties of cohesion and adhesion allow the water to move up a tree regardless of its height: Cohesion allows the individual water molecules to stick together in one continuous stream, while adhesion permits the water molecules to adhere to the cellulose molecules in the walls of xylem cells.

There is 1 question to complete.