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WorksheetsAbsorption by roots
Total questions: 13
Worksheet time: 7mins
What is imbibition?
Free movement of water molecules
The movement of solvent molecules from a region of higher concentration to a region of lower concentration
The movement of solvent molecules from a region of higher concentration to a region of lower concentration through a semi-permeable membrane
A phenomenon by which living/ dead plant cells absorb water by surface attraction
What is diffusion?
The surface attraction of water molecules
The movement of a substance from a region of higher concentration to a region of lower concentration
The movement of solvent molecules from a region of lower concentration to a region of higher concentration
What is osmosis?
The movement of solvent molecules from their region of higher concentration to lower concentration through a semi-permeable membrane
The movement of solvent molecules from a region of higher concentration to a region of lower concentration
A phenomenon by which living or dead cells absorb water by surface attraction
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
What is active transport?
The phenomenon by which dead or living cells absorb water through surface attraction
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
The movement of water molecules through a semi-permeable membrane from their region of higher to lower concentration
None of the above
What is turgidity?
None of these
The condition in which the cell content is shrunken and the cell is no longer turgid
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
The contraction of cytoplasm from the cell wall is caused due to the withdrawal of water when placed in a strong hypertonic solution
What is flaccidity?
The contraction of the cytoplasm from the cell wall due to being placed in a hypertonic solution
The condition in which the cell content is shrunken and the cell is no longer 'tight'
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
None of the above
What is plasmolysis?
The contraction of the cytoplasm from the cell wall due to being placed in a hypertonic solution
The state of a cell in which the size of the vacuole increases due to increased absorption of water
The condition of a cell in which the cell contents are shrunken and it's no longer tight
What is osmotic pressure
Minimum pressure required to begin the process of osmosis
Minimum pressure required to stop the passage of solute through a semi-permeable membrane
Minimum pressure required to stop the passage of a solvent through a semi-permeable membrane
None of the above
Which of these is incorrect?
Isotonic- The concentration of water on both sides of the semi-permeable membrane is equal
Hypertonic- The solution outside has a lesser concentration of water molecules
Hypotonic- The solution outside has a higher water concentration
Osmotic pressure- The maximum pressure required to stop the occurrence of osmosis
Which of the following are correctly defined?
Turgor pressure- the minimum pressure required to make a cell turgid
Turgor pressure- the pressure exerted by the cell contents on the cell wall
Wall pressure- the pressure exerted by the cell wall on the contents of the cell
Wall pressure- the minimum pressure required to stop the occurrence of osmosis
Which of these is not a use of turgidity for plants?
Helps push through hard ground
Builds up root pressure
Provides rigidity for soft tissues
Helps in building up wall pressure
What is guttation?
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
The loss of water in a plant through a cut or break in its stem
Which of these is NOT a characteristic that roots are dependent on to absorb water?
High surface area
Root hairs contain cell sap of higher concentration than the surrounding water
Root hairs contain cell sap of lower concentration than the surrounding water
Thin cell wall
