DP Biology Questionbank
9.1 Transport in the xylem of plants
Description
| Nature of science: Use models as representations of the real world—mechanisms involved in water transport in the xylem can be investigated using apparatus and materials that show similarities in structure to plant tissues. (1.10) |
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Understandings:
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Utilization: Syllabus and cross-curricular links: Biology Topic 2.2 Water Topics 2.9 and 8.3 Photosynthesis Aims:
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- 17M.3.HL.TZ2.3b: Predict, with a reason, what will happen to the pressure in this tube as transpiration occurs.
- 17M.3.HL.TZ2.3c: Outline how this control set-up could be modified to test the effect of either humidity or...
- 17M.3.HL.TZ2.3a: State the specific type of plant tissue that the plastic tube is meant to model.
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20N.3.HL.TZ0.1b:
The mean stomatal density for the lower epidermis of P. decandrum was around 600 per mm2. Predict how the stomatal density for the upper epidermis would compare.
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20N.2.HL.TZ0.7b:
Describe the processes that cause water to move from the roots of plants to their leaves.
- 20N.1.HL.TZ0.32: The graph shows the percentage of stomata that are open in two different species of plants over a...
- 17N.1.HL.TZ0.34: Cobalt chloride paper is blue when dry but turns pink with water. Blue cobalt chloride paper was...
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21M.1.HL.TZ2.32:
The apparatus in the diagram was used to assess the effects of factors on transpiration rates.
[Source: Republished with permission of Springer-Verlag from Experimentelle Pflanzenphysiologie: Band 2, Peter Schopfer, 1st edition, 1st Jan 1989; permission conveyed through Copyright Clearance Center, Inc.]
Which factor would be a controlled variable in an experiment designed to assess the effects of temperature on transpiration rate?
A. The opening and closing of stomata
B. The intensity of light striking the plant
C. The height of the water in the reservoir
D. The evaporation of water from the leaves
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21N.2.HL.TZ0.7b:
Distinguish between the xylem and phloem of plants.
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22M.2.HL.TZ1.6b:
Describe how changes in weather conditions affect the transport and loss of water in plants.
- 22M.1.HL.TZ1.32: Which graph represents the effect of humidity on the transpiration rate in plants?
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- 18N.3.HL.TZ0.2c: Describe the distribution of vascular tissues in the stem of dicotyledonous plants.
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- 18M.3.HL.TZ1.3a: Suggest a possible research question that could be investigated using a potometer.
- 18M.3.HL.TZ2.3c: Explain the effect of relative humidity on the rate of water uptake.
- 18M.3.HL.TZ2.3a: Outline how the rate of water uptake is recorded in this potometer.
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18M.3.HL.TZ1.3b:
Evaluate the limitations of using a potometer in the investigation you suggested in (a).
- 18M.3.HL.TZ2.3b: State a variable that needs to be controlled in this experiment.
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19M.1.HL.TZ2.38:
The image is a cross section through an Ammophila leaf, which grows on coastal sand dunes.
[Source: Charles Good: The Ohio State University at Lima]
What feature suggests that Ammophila is a xerophyte?
A. The leaf surface area is increased.
B. The rolled leaf reduces the upper epidermis area.
C. The rolled leaf protects the lower epidermis from the wind.
D. The lower epidermis can transpire more easily.
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19M.3.HL.TZ1.2d.ii:
Label with a C the tissue where organic compounds are transported.
- 19M.3.HL.TZ1.2c: One criticism of the experiment is that it only measured the rate of transpiration indirectly....
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19M.3.HL.TZ1.2d.i:
Label with an R the tissue where the red dye would appear.
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- 19M.3.HL.TZ1.2a: State the function of the tap and reservoir.
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- 19N.3.HL.TZ0.2a.i: Describe the trend in the data.
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19N.1.HL.TZ0.33:
In the micrograph of a plant stem, which letter indicates the xylem?
[Source: adapted from Kelvinsong/https://creativecommons.org/licenses/by/3.0/deed.en]
- 19N.1.HL.TZ0.32: Which process is most responsible for movement of water from roots to leaves of a plant on a hot...
- 19N.3.HL.TZ0.2a.ii: Transpiration continued after the fifth leaf had been removed. Suggest what can be concluded.
