Transport in Plants (OCR A-Level Biology A): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
In which direction does water move according to water potential gradients?
In which direction does water move according to water potential gradients?
From high to low water potential
What is the primary function of root hair cells in water absorption?
What is the primary function of root hair cells in water absorption?
Increase surface area for absorption
Which statement best describes the apoplastic pathway?
Which statement best describes the apoplastic pathway?
Water moves through cell walls & spaces
What are plasmodesmata?
What are plasmodesmata?
Channels linking adjacent cell cytoplasm
What substance composes the Casparian strip?
What substance composes the Casparian strip?
Suberin
How does the Casparian strip control which substances enter the xylem?
How does the Casparian strip control which substances enter the xylem?
It blocks apoplast, forcing H2O thru membrane
What type of bond causes cohesion between water molecules?
What type of bond causes cohesion between water molecules?
Hydrogen bonds
In cohesion-tension theory, what creates the tension at the top of the xylem?
In cohesion-tension theory, what creates the tension at the top of the xylem?
Evaporation of water from leaves
What role does adhesion play in water transport?
What role does adhesion play in water transport?
Keeps H2O column in place at night
Where is water potential highest and lowest in a plant?
Where is water potential highest and lowest in a plant?
Highest in roots, lowest in leaves