Term
| evaporation of water from plant leaves |
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Definition
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Term
| Why is transpiration a problem? |
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Definition
| It causes desiccation and loss of turgor pressure (from water), i.e. rigidity |
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Term
| How much water is lost through transpiration? |
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Definition
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Term
| True or false? Carbon dioxide does not diffuse into the mesophyll cells as a gas, but instead passes through the plasma membrane in a solution. |
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Definition
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Term
| What is the relative humidity inside of a leaf? |
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Definition
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Term
| formed by water vapor around leaf when air is still; increases relative humidity in surrounding atmosphere |
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Definition
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Term
| Why do leaves almost always lose water when the stomata are open? |
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Definition
| The relative humidity outside of the leaf is almost always less than 100% |
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Term
| How does wind speed affect transpiration? |
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Definition
| Wind carries water vapor away from the leaf and destroys the boundary layer. |
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Term
| How does light intensity affect the rate of transpiration? |
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Definition
| Light intensity causes the stomata to open and the rate of transpiration to increase. |
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Term
| What features does a leaf have that enhance photosynthesis but increase transpiration? |
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Definition
| stomata, large surface area, and lots of internal air space |
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Term
| What features does a leaf have that limit transpiration but inhibit photosynthesis? |
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Definition
| cuticle, stomata (close when plant gets dehydrated), trichomes (reflect light) |
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Term
| What are the benefits of transpiration? |
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Definition
| Transpiration regulates temperature and facilitates the movement of water throughout the plant. |
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Term
| True or false? A large amount of energy is needed to move water throughout a plant. |
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Definition
| False. Water moves through a plant through osmosis. |
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Term
| the process by which water moves throughout a plant |
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Definition
| transpiration-cohesian mechanism of water flow |
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Term
| property of water that makes molecules stick together so that they withstand the suction force, creating a continuous column of water |
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Definition
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Term
| property of water that makes it stick to the xylem cell walls, preventing gravity from pulling it down |
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Definition
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