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22 Cards in this Set
- Front
- Back
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Where do water enter plants from? |
Roots |
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What is transpirtation |
The release of water from a plant by evaporation |
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Where do plants lose most of their water |
Stomata |
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Why do dicot plants keep most of their stomata on the lower surface |
To prevent excessive water loss through the stomata since the up side of the leaf comes in contact with more environmental factors that causes transpiration |
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What organ on the leaf's main function is gaseous exchange? |
Stomata |
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What is the side effect of opening the stomata fi gaseous exchange? |
Water loss |
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What time do stomata open? |
Day |
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Why do stomata open up during day |
To intake co2 to photosynthesize with sunlight |
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What controls the amount of water losses through the stoma and CO2 in tooked |
Gaurd cells |
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What happens when gaurd cells are turgid |
They assume a shape that allows the stomata to open to take in co2 |
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When do gaurd cells collapse |
Usually in dry conditions they close to slow down transpiration |
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What happens as a side effect when the stomata closes to slow transpiration. |
No co2 no photosynthesis |
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4 Disadvantages of losing water |
Losing water needed for photosynthesis
Needed for chem reactions and metabolic activities
Losing water causes wilting which impacts the stability of the plant
Water is needed to transport minerals |
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2 Advantages of transpiration |
A force called Transportation pull which is needed to transport water and minerals to the leaves
Provides moisture for the diffusion of co2 into the cells and O2. Out of the cell
Transpirtation cools the plant |
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What is the transpirtation stream |
The uninterrupted flow of water through the xylem due to the force of the transpirtation pull |
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How does light affect the rate of transpiration |
The plant opens the stomata in ligh do that it can take in the CO2 needed for photosynthesis which results in an increase in transpiration |
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Why do plants transpire more rapidly in high temperatures? |
Evaporation will talk place at a faster rate resulting in the leaf transpiring faster |
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True or false, if the air is dry water will not transpire faster. Give reason |
Falso, the water will transpire faster due to the leaf having a larger water potential than the air around |
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Name the layer of stationery air around the leaf |
Leaf boudry layer |
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What is the name of the layer that water must diffuse through before being swept away by moving air |
Boundary layer |
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How does the wind affect the leaf boundary layer? |
The wind removes the boundary layer speeding up transpirtation |
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True are false soil water concentration affects rate of transpiration |
True, if not sufficient water in the root stomata close. |
