13 Questions
What is the main force responsible for the movement of water in xylem conduits?
Cohesion-tension hypothesis
What is the function of the Casparian strip in plants?
It prevents the movement of water and solutes through the apoplast.
What is the purpose of the Casparian strip in plant roots?
To prevent the movement of water through the apoplast
How does guttation occur in plants?
It is caused by positive pressure in the xylem conduits.
What drives the bulk flow of water and minerals from roots to shoots in plants?
Negative pressure in the xylem conduits.
What causes guttation in plants?
Positive pressure in herbaceous plants
What drives the bulk flow of water and minerals from roots to shoots in plants?
Surface tension at air-water interface
What is the cohesion-tension hypothesis?
It explains the ascent of water in a continuous column held together by cohesive forces.
What creates the cohesive forces that hold the continuous column of water in the xylem conduits together?
Hydrogen bonding of water molecules
What creates the surface tension at the air-water interface in plants?
The attraction of water molecules to each other.
What is the main cause of water movement into the root cortex of plants?
Transport of soil solutes into root cells, creating a gradient for water to move
What is the main purpose of the root cortex in plants?
To lower water potential for the movement of water into the root cortex
What is the main force responsible for the movement of water into the vascular cylinder of a plant?
Lowering of water potential by soil solutes
Study Notes
- Water in soil moves into vascular cylinder of plant.
- Soil solutes transported into root cells lower water potential, creating gradient for water to move into root cortex.
- Sap travels to vascular cylinder for ascent; movement through apoplast stopped by Casparian strip.
- Water pulled up by tension or pushed up by positive pressure in short herbaceous plants.
- Guttation occurs from positive pressure but is limited to herbaceous plants and works only at night.
- Water in xylem conduits pulled by negative pressure due to transpiration.
- Surface tension created at air-water interface by attraction of water molecules to each other.
- Bulk flow of water and minerals from roots to shoots driven by surface tension at air-water interface.
- Cohesion-tension hypothesis explains ascent of water in continuous column held together by cohesive forces.
- Hydrogen bonding of water molecules to each other creates cohesive forces.
Are you a plant enthusiast or a biology student looking to test your knowledge of plant physiology? This quiz covers the fascinating topic of water movement in plants. From the transport of solutes in soil to the ascent of water through the xylem conduits, this quiz delves into the various mechanisms that allow plants to absorb and transport water. Test your understanding of concepts such as the cohesion-tension hypothesis, guttation, and surface tension. This quiz will challenge your knowledge of plant biology and leave
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
