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21 Cards in this Set
- Front
- Back
- 3rd side (hint)
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Describe how ions are obtained and transported through plants? |
Ions are taken up by active transport from an area of low to high concentration. The ions travel through the xylem upwards from the soil to the leaves. |
Upwards, xylem, atHl |
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Describe how water is obtained and transported through plants? |
Water is taken up by osmosis from an area of high water potential to an area of low water potential, through the xylem from the roots to the leaves and along the transpiration stream where movement replaces water as it evaporates from leaves. |
Osmosis, water potential, xylem, transpiration stream. |
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Describe how sugar is obtained and transported through plants? |
Sugar is a product of photosynthesis and travels up or down the phloem to other parts of the plants or storage organs. |
Photosynthesis, phloem, direction. |
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What is the function of the stomata? |
The stomata are controlled by the guard cells and are holes that open to allow the diffusion of carbon dioxide in and the net movement of oxygen out. |
Guard cells |
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What are the function of veins? |
Veins carry dissolved water and sugar around the leaf. |
Dissolved |
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What is the function of the wax cuticle? |
The wax cuticle is the outer surface of the leaf and reduce the amount of water loss via evaporation and protects the leaf from damage to the palisade cell. |
Evaporation |
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What is the function of the spongy mesophyll? |
The spongy mesophyll is not tightly packed together and has air pockets that allow carbon dioxide to reach palisade cells. It has a large SA for gas exchange. |
Gas |
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What is the function of the palisade mesophyll? |
The palisade mesophyll is uniform with loads of chloroplasts for photosynthesis. It is adapted for the light conditions. |
Photosynthesis |
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What is word and symbol equation for photosynthesis? |
Carbon dioxide + water-> oxygen +glucose 6CO2+6H2O->6O2+C6H12O6 |
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How do you test a leaf for starch? |
. Put on PPE and googles . Place one leaf in a test tube full of ethanol and another in a test tube full of ethanol. . Place the test tube in a hot water bath. . Then clean the leaf in water. .Place on a white tile and place a few drops of iodine on the leaf. |
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What are limiting factors of Photosynthesis? |
Light intensity Carbon dioxide concentration Temperature Chlorophyll |
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What is the method to measure the effect of light intensity on photosynthesis? |
Set up apparatus as shown Fill the beaker with water and hydrogen carbonate. Place alight in front of the beaker and and wait until a steady stream of bubbles are being produced. Start the stopwatch count bubbles for one minute and stop the stopwatch record you results and repeat twice for reliable results. Repeats the last step at distances of 20cm, 30cm and 40cm from the light source.
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What is translocation? |
Translocation is the movement of dissolved sugars throughout the plant. |
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What plant tissue is located at the tips of roots and can differentiate? |
Meristem tissue |
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What tissue covers the surface of the leaf? |
Epidermal tissue |
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What happens to a plant of kept in the dark for too long? |
The plant would become de-starched as it cannot photosynthesise. |
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What chemical will be in short supply if their are insufficient nitrates? |
Amino acids |
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What are the functions of the waxy cuticle and epidermis? |
Waxy cuticle - meant to prevent water loss via evaporation. Epidermis - a tissue meant to protect the palisade mesophyll. |
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Which reagent can be added to leaves to show that photosynthesis has occurred? |
Iodine solution |
Iodine is solid at room temperature. |
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Explain why translocation is important in plants? |
Translocation is important to move glucose, a product of photosynthesis, from the leaf to storage organs where it can be stored as starch or to the roots where it can be used for active transport/growth. |
Say where it is made! Where it is transported to and why? |
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A thermometer was placed in a glass beaker, why? |
To measure heat To check the temperatures not changing. The rate of photosynthesis is affected by temperature.. |
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