wayground logo

Free Printable Worksheets

Font size

S
M
L
XL
Worksheets

Absorption by roots

Total questions: 13

Worksheet time: 7mins

Name
Class
Date
1.

What is imbibition?

a)

Free movement of water molecules

b)

The movement of solvent molecules from a region of higher concentration to a region of lower concentration

c)

The movement of solvent molecules from a region of higher concentration to a region of lower concentration through a semi-permeable membrane

d)

A phenomenon by which living/ dead plant cells absorb water by surface attraction

2.

What is diffusion?

a)

The surface attraction of water molecules

b)

The movement of a substance from a region of higher concentration to a region of lower concentration

c)

The movement of solvent molecules from a region of lower concentration to a region of higher concentration

3.

What is osmosis?

a)

The movement of solvent molecules from their region of higher concentration to lower concentration through a semi-permeable membrane

b)

The movement of solvent molecules from a region of higher concentration to a region of lower concentration

c)

A phenomenon by which living or dead cells absorb water by surface attraction

d)

The passage of a substance from its region of lower concentration to a higher concentration through a living cell membrane using energy from the cell

4.

What is active transport?

a)

The phenomenon by which dead or living cells absorb water through surface attraction

b)

The passage of a substance from its region of lower concentration to a higher concentration through a living cell membrane using energy from the cell

c)

The movement of water molecules through a semi-permeable membrane from their region of higher to lower concentration

d)

None of the above

5.

What is turgidity?

a)

None of these

b)

The condition in which the cell content is shrunken and the cell is no longer turgid

c)

The state of a cell in which the cell wall is rigid and stretched by an increase in the volume of the vacuoles due to the absorption of water

d)

The contraction of cytoplasm from the cell wall is caused due to the withdrawal of water when placed in a strong hypertonic solution

6.

What is flaccidity?

a)

The contraction of the cytoplasm from the cell wall due to being placed in a hypertonic solution

b)

The condition in which the cell content is shrunken and the cell is no longer 'tight'

c)

The state of a cell in which the cell wall is rigid and the volume of the cytoplasm has increased due to the absorption of water

d)

None of the above

7.

What is plasmolysis?

a)

The contraction of the cytoplasm from the cell wall due to being placed in a hypertonic solution

b)

The state of a cell in which the size of the vacuole increases due to increased absorption of water

c)

The condition of a cell in which the cell contents are shrunken and it's no longer tight

8.

What is osmotic pressure

a)

Minimum pressure required to begin the process of osmosis

b)

Minimum pressure required to stop the passage of solute through a semi-permeable membrane

c)

Minimum pressure required to stop the passage of a solvent through a semi-permeable membrane

d)

None of the above

9.

Which of these is incorrect?

a)

Isotonic- The concentration of water on both sides of the semi-permeable membrane is equal

b)

Hypertonic- The solution outside has a lesser concentration of water molecules

c)

Hypotonic- The solution outside has a higher water concentration

d)

Osmotic pressure- The maximum pressure required to stop the occurrence of osmosis

10.

Which of the following are correctly defined?

a)

Turgor pressure- the minimum pressure required to make a cell turgid

b)

Turgor pressure- the pressure exerted by the cell contents on the cell wall

c)

Wall pressure- the pressure exerted by the cell wall on the contents of the cell

d)

Wall pressure- the minimum pressure required to stop the occurrence of osmosis

11.

Which of these is not a use of turgidity for plants?

a)

Helps push through hard ground

b)

Builds up root pressure

c)

Provides rigidity for soft tissues

d)

Helps in building up wall pressure

12.

What is guttation?

a)

The loss of excessive water from the plant due to the build-up of root pressure is guttation. Water is lost through specialized cells called Hydathodes

b)

The loss of water in a plant through a cut or break in its stem

13.

Which of these is NOT a characteristic that roots are dependent on to absorb water?

a)

High surface area

b)

Root hairs contain cell sap of higher concentration than the surrounding water

c)

Root hairs contain cell sap of lower concentration than the surrounding water

d)

Thin cell wall