What substances does transpiration in plants support?
water and minerals
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What factors affect the rate of transpiration?
Air flow, light intensity, temperature, humidity
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Why does temperature and light intensity increase the rate of transpiration?
The water evaporates faster
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What direction does water move in plant?
Up - from roots to the leaves
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When measuring the rate of transpiration with a potometer, why is the calculation only an estimate?
A small amount of the water taken up by the shoot is used in the leaves and is not transpired.
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What are two features of translocation?
Bidirectional and it travels through phloem tubes
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What is translocation?
the process by which food produced in photosynthesis is transported from the leaves to the growing regions of plants and storage organs.
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What does translocation transport?
Food produced in photosynthesis
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Why are xylem cells well adapted for transpiration?
they have no end walls, they have lignin (strengthens the cell walls and waterproofs the elongated cells) and they are dead (so the resistance to water flow is low)
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Why is a root hair cell well adapted for transpiration?
Theres mitochondria (ensures there is enough energy), long projections (increases surface area for water and minerals to be absorbed)
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Other cards in this set
Card 2
Front
What substances does transpiration in plants support?
Back
water and minerals
Card 3
Front
What factors affect the rate of transpiration?
Back
Card 4
Front
Why does temperature and light intensity increase the rate of transpiration?
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