Biology: Year 9 Term 4: Transpiration/Translocation

Created by: Charlotte Herondale
Created on: 17-12-18 15:45

Define 'translocation' (4)

The transport of sugars through the phloem from the leaf to the rest of the plant for respiration, storage and growth

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Define 'transpiration' (4)

The transport of water through the xylem from the roots to the leaves for photosynthesis, cooling, support and mineral transport.

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What are the adaptations of root hair cells? (4)

Large vacuole for water storage; large SA for AT; no chloroplasts as underground; thin walls for osmosis/AT

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What is the 2nd definition of transpiration? (2)

The loss of water through the stomata due to evaporation

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How does this process occur? (4)

1) Water evaporates and diffuses from stomata 2) More water is drawn from the leaf xylem to replace it 3) The xylem is a continuous tube so water is drawn from roots 4) Water flows up the plant with no energy usage

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When do stomata close? (2)

Low water levels, guard cells flaccid

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When do stomata open? (2)

High water levels, guard cells turgid

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How is water loss prevented? (3)

Waxy cuticle, Small amount of stomata on top of leaf where more would evaporate as it is warmer, more on cooler bottom

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What factors affects the rate of transpiration? (4)

Heat increases as more kinetic energy, Humidity decreases as become isotonic quickly, Light increases as stomata are open to collect CO2 for photosynthesis, Wind increases as carried away so gradient not closed

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How is transpiration measured? (3)

Potometer - bubble in water tube moves as water pulled away by transpiration

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Other cards in this set

Card 2

Front

Define 'transpiration' (4)

Back

The transport of water through the xylem from the roots to the leaves for photosynthesis, cooling, support and mineral transport.

Card 3

Front

What are the adaptations of root hair cells? (4)

Back

Card 4

Front

What is the 2nd definition of transpiration? (2)

Back

Card 5

Front

How does this process occur? (4)

Back

View more cards

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Biology: Year 9 Term 4: Transpiration/Translocation