Plant Organ System (OCR GCSE Biology A (Gateway Science Suite)): Quizzes
📚Quizzes
Practise the questions
12 questions from this quiz
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Practise the questions
12 questions from this quiz
What is translocation?
What is translocation?
Movement of food in phloem for use/storage
What is transpiration?
What is transpiration?
Loss of water vapour from leaves & stems
Why does transpiration occur in plants?
Why does transpiration occur in plants?
It's a consequence of gaseous exchange
How are water molecules pulled up through the xylem?
How are water molecules pulled up through the xylem?
Attraction between molecules pulls up rest
How does increased temperature affect transpiration rate?
How does increased temperature affect transpiration rate?
Increases it due to faster evaporation
How does high relative humidity affect transpiration?
How does high relative humidity affect transpiration?
Decreases it by reducing gradient
How does increased air movement affect transpiration?
How does increased air movement affect transpiration?
Increases it via steeper gradient
How does increased light intensity affect transpiration?
How does increased light intensity affect transpiration?
Increases it as more stomata open
What is a potometer used for?
What is a potometer used for?
Measuring water uptake by a plant
What shape are guard cells?
What shape are guard cells?
Kidney-shaped
What is the structure of guard cell walls?
What is the structure of guard cell walls?
Thin outer walls, thick inner walls
Where are most stomata found on a leaf?
Where are most stomata found on a leaf?
On the bottom surface