2.1.2: Water

Question 1

What enables essential polar substances to be transported easily in animals and plants?

Answer 1

Water

Water dissolves many essential polar substances, facilitating their transport in the blood of animals and xylem of plants.

Question 2

What is the term used to describe water molecules ‘sticking’ together?

Answer 2

Cohesion

Cohesion refers to the attraction between water molecules due to hydrogen bonds.

Question 3

What allows water to move up the xylem in plants as a continuous column?

Answer 3

Cohesion

The cohesion of water molecules creates a continuous column that is easier to draw up than individual molecules.

Question 4

Fill in the blank: The movement of water up the xylem due to transpiration is a _______.

Answer 4

Continuous column

A continuous column of water is advantageous for the transport of water in plants.

Question 5

What type of bonds cause water molecules to stick together?

Answer 5

Hydrogen bonds

Hydrogen bonds are responsible for the cohesion of water molecules.

Question 6

True or False: Transpiration involves the movement of water as individual molecules.

Answer 6

False

Transpiration involves the movement of a continuous column of water, not individual molecules.