10 minutes maximum! Can you do it in 5?
Q1+2: The diagram shows a cross section of a plant stem:
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1. What is the name of tissue X?
- A. Epidermis
- B. Mesophyll
- C. Xylem
- D. Phloem
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2. What substance is translocated in tissue X?
- A. Sucrose
- B. Water
- C. Starch
- D. Magnesium ions
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3-5: A student placed a leaf stalk of celery into a glass of red dye.
After 3 hours the leaves had turned a pink colour. |
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3. The dye had risen up the celery stalk by the process of ..
- A. respiration
- B. transpiration
- C. translocation
- D. transcription
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| The student cut through the stalk and examined the section under the microscope:
 
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4. The regions labelled X were coloured red. What does this tell you about the function of the plant tissue in region X?
- A. transports sugar
- B. transports the red solution
- C. transports oxygen
- D. transports plant hormones
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5. Which conditions would make the dye rise up the stalk more quickly?
- A. Hot and humid
- B. Cold and windy
- C. Hot and windy
- D. Humid and windy
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| 6-8: This section is about plants and water. Select the best word to complete the sentences: |
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| Water enters root hairs by
. |
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The water passes across the root and enters the xylem.
The water rises up the xylem and evaporates from the
mesophyll cells of the leaves. |
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| The water vapour
out of the leaf, |
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| through small pores called
. |
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9. A person bought a plant of basil from the shop and left it in a hot kitchen: |
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plant in hot kitchen
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several hours later |
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After a few hours the cells of the leaves in the plant have become ..
- A. flaccid
- B. turgid
- C. softer
- D. darker
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10. The rate of transpiration can be measured using a potometer:
| Theresa Knott | CC 3.0 |
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The rate was measured in still warm air and with a hot fan.
The graph below shows the two different rates of transpiration:
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10. In hot and windy conditions, what is the rate of transpiration?
- A. 0.33 mm/s
- B. 0.1 mm/s
- C. 10 mm/s
- D. 3 mm/s
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