10 – To Investigate Factors Affecting the Rate of Transpiration in Plants (LC 2027) (Leaving Cert Biology): Quizzes
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Practise the questions
13 questions from this quiz
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Practise the questions
13 questions from this quiz
What does a potometer measure?
What does a potometer measure?
Rate of water uptake by plants
Why must the plant shoot be cut underwater?
Why must the plant shoot be cut underwater?
To prevent air entering the xylem
Why is the plant shoot cut at an angle?
Why is the plant shoot cut at an angle?
To increase surface area for absorption
What is the purpose of petroleum jelly in the potometer setup?
What is the purpose of petroleum jelly in the potometer setup?
To create an airtight seal
What movement is measured in the capillary tube?
What movement is measured in the capillary tube?
Air bubble displacement
Why should measurements be repeated three times?
Why should measurements be repeated three times?
To calculate averages for reliability
How does air movement affect transpiration rate?
How does air movement affect transpiration rate?
Increases it by removing water vapour
How does higher temperature affect transpiration?
How does higher temperature affect transpiration?
Increases kinetic energy of water molecules
Why does higher light intensity increase transpiration?
Why does higher light intensity increase transpiration?
Causes stomata to open wider
How do thick cuticles affect transpiration rate?
How do thick cuticles affect transpiration rate?
Decrease it by creating a waxy barrier
What effect does higher CO₂ concentration have on transpiration?
What effect does higher CO₂ concentration have on transpiration?
Decreases it by allowing stomata to close
Why should only one variable be changed at a time?
Why should only one variable be changed at a time?
To ensure fair testing of each factor
What type of plant shoot should be used in a potometer?
What type of plant shoot should be used in a potometer?
Non-glossy leafed shoot like beech