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19 Cards in this Set
- Front
- Back
Name this vessle |
Xylem |
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Which leaf structure is the main site of photosynthesis? |
The palisade mesophyll cells |
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Where are the xylem and phloem vessels contained within the leaf structure? |
The vein |
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Which area in the leaf structure allows for the exchange of gases and allows water to evaporate out? |
Stomata |
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What controls the opening and closing of the pores in the leaf? |
Gaurd cells |
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An area within the leaf cell which contains moist air spaces to aid with gas exchange. |
Spongy mesophyll cells |
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What are the outermost layers in the leaf structure? |
The upper and lower epidermis |
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Name this vessel |
Phloem |
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What is the function of the phloem vessels? |
To transport sugars from the leaf to the rest of the plant. |
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What are the two functions of the xylem vessels? |
To transport water from the roots to the leaves of a plant and to provide the plant with with support. |
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Why does the phloem vessels have a companion cell? |
To provide the vessels with energy. |
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Why do xylem vessels contain rings or spirals of lignin? |
To help provide the vessels with support by giving the walls strength. |
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How do the stomata open and close? |
The guard cells fill with water during the day to open the stomata and at night the water leaves the guard cells to close the stomata. |
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"Thepassage of water from the roots to the leaves and out into the atmosphere" This defines what process? |
Transpiration or the transpiration stream |
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Which cells are important in the transpiration stream for allowing water to be absorbed from the soil into the roots of a plant? |
Root hair cells |
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What is the route taken by water in Transpiration? |
Soil > Root hair cells > xylem vessels > Spongy mesophyll cells > Air spaces > Atmosphere. |
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What factors could affect the rate of transpiration? |
Temperature, Wind, Humidity and Air pollution |
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What factors would cause an increase in the rate of transpiration? |
Temperature and Wind |
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What factors would cause a decrease in the rate of transpiration? |
Air pollution and Humidity. |