Plant Organ System (AQA GCSE Biology Combined Science): Flashcards
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Practise the cards
10 cards from this deck
Translocation
Translocation
Movement of food substances in phloem, up or down
Transpiration
Transpiration
Loss of water vapour from leaves and stems
Transpiration stream
Transpiration stream
Continuous flow of water through the plant
Effect of increased temp on transpiration
Effect of increased temp on transpiration
Molecules move faster, evaporation increases, rate increases
Effect of high humidity on transpiration
Effect of high humidity on transpiration
Reduces concentration gradient, slows transpiration
Effect of increased wind on transpiration
Effect of increased wind on transpiration
Steeper concentration gradient, increases rate
Effect of increased light on transpiration
Effect of increased light on transpiration
More photosynthesis, more stomata open, increases rate
Potometer function
Potometer function
Measures water uptake to indicate transpiration rate
Guard cells function
Guard cells function
Close and open stomata
Location of most stomata on leaf
Location of most stomata on leaf
Bottom of leaf to minimise water loss