Plant Water Relations
Biology ⇒ Plant Biology
Plant Water Relations starts at 8 and continues till grade 12.
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See sample questions for grade 10
Define osmosis in the context of plant water relations.
Describe the effect of wind on the rate of transpiration.
Describe the role of cohesion and adhesion in the ascent of sap.
Describe the role of root hairs in water absorption.
Describe what happens to a plant cell in an isotonic solution.
Explain how humidity affects the rate of transpiration.
Explain the difference between transpiration and evaporation in plants.
Explain the term 'plasmolysis'.
Explain the term 'water potential' and its significance in plant water relations.
Explain why desert plants often have thick cuticles and reduced leaf surface area.
Explain why wilting is reversible in some cases but not in others.
If a plant cell is placed in a hypotonic solution, what will happen to the cell?
If a plant is placed in a very salty solution, what will happen to its cells?
What is the main driving force for the movement of water up the xylem vessels?
What is the process by which plants lose water vapor from their aerial parts called?
A plant cell has a solute potential (Ψs) of -0.8 MPa and a pressure potential (Ψp) of 0.3 MPa. Calculate the water potential (Ψ) of the cell.
A plant is exposed to high light intensity and low humidity. Predict and explain the effect on its rate of transpiration.
A scientist observes that a plant growing in saline soil has developed specialized structures on its leaves to excrete excess salt. How might this adaptation affect the plant’s water relations?
Describe the role of the Casparian strip in regulating water and mineral uptake in plant roots.
Explain how the structure of xylem vessels facilitates the efficient transport of water in plants.
