Transpiration — Practice Quiz
ICSE · Class 10 · Biology
Try a 4-question quiz on Transpiration for ICSE Class 10 Biology: tap an answer to check it and see why. 42 questions in the full chapter test.
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What is transpiration?
Which type of transpiration accounts for 80-90% of total water loss in plants?
What are the cells that surround each stoma called?
During which time of day do stomata usually open?
Sample Questions
Which factors increase the rate of transpiration?
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High temperature, Bright sunlight, Fast wind
High temperature, bright sunlight, and fast wind all increase transpiration rate. High humidity decreases transpiration as it reduces the concentration gradient for water vapor diffusion.
What is the waxy layer covering aerial parts of plants called?
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Cuticle
The cuticle is a waxy layer that covers aerial parts of plants. It is almost waterproof and helps reduce water loss through cuticular transpiration.
Which instrument is used to measure the rate of transpiration?
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Potometer
A potometer, specifically Ganong's potometer, is used to measure the rate of transpiration by measuring the water uptake by a leafy shoot.
What happens to guard cells when stomata open?
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They become turgid
When stomata open, guard cells become turgid due to water absorption. This happens because glucose produced during photosynthesis increases their osmotic pressure.
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