|
A seed plant is held in the ground by its |
B. Roots |
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Ground tissue is found in a plant’s |
D. Roots, stems, and leaves |
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In most plants, which organs are adapted to capture sunlight for photosynthesis? |
C. Leaves |
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In angiosperms, xylem consists of tracheids and |
C. Vessel elements |
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If some of the xylem of a young oak tree were destroyed, it would most likely interfere with the tree’s ability to |
D. Conduct water to the leaves |
|
Unlike tracheids, some vessel elements |
C. Are found in angiosperms |
|
Look at figure 23-1. How would damage to structure B affect structure A? |
A. The organelles in structure A would die. |
|
To observe mitosis, which of the following should a student examine under a compound microscope? |
B. Tip of a shoot |
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Which of the following are areas of unspecialized cells in which mitosis produces new cells that are ready for differentiation? |
B. Meristems |
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In Figure 23-2, what letter indicates the tissue in which the products of photosynthesis are stored? |
B. C |
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Damage to which area of the root shown in Figure 23-2 will prevent the root from growing longer? |
D. H |
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The layer of cells that encloses the vascular tissue in the central region of a root is the |
A. Endodermis |
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The root cap is a tough structure that protects the |
C. Meristem |
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Mineral nutrients from the soil move into roots by |
C. Active transport |
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There is a one-way movement of water and minerals from the cortex into the vascular cylinder of a root because |
D. The Casparian strip is waterproof |
|
The soil around a lilac bush was watered with a solution containing radioactive phosphorus. Several hours later, radiation was detected in its stems. through which cells did the radioactive phosphorus travel to the vascular cylinder? |
C. Tracheids and vessel elements |
|
Root pressure |
D. Is produced in the vascular cylinder by active transport |
|
In a plant’s stem, the vascular tissue |
B. Is continuous from the roots to the leaves |
|
Unlike roots, stems |
D. May plat a part in photosynthesis |
|
Many cacti, such as saguaros and barrel cacti, have large stems but no leaves. What function of leaves is taken on my the stems of such cacti? |
A. They produce food by photosynthesis |
|
One function of stems is to physically support leaves in a position to maximize photosynthesis. In large trees, the support function of stems is primarily due to |
C. Vascular cambium |
|
During primary growth, a stem |
A. Increases in length |
|
In dicots, secondary growth |
D. Produces bark and wood |
|
What might a thin tree ring suggest? |
D. A year of drought |
|
Which of the following describes the heartwood of a tree? |
B. Old xylem that is no longer conducting water |
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Oxygen and carbon dioxide move in and out of a leaf through the |
C. Phloem |
|
Most of the photosynthesis in plants takes place in the |
A. Mesophyll |
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The flat structure of a leaf blade enables its function as a photosynthetic organ by |
D. Exposing a greater surface area to capture energy from sunlight |
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Look at Figure 23-3. Which letters indicate cells in which a large number of chloroplasts would likely be found? |
B. B and C |
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In Figure 23-4, label X points to a |
D. Stoma |
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In Figure 23-4, the water pressure in the |
C. Guard cells is high |
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The stomata of leaves are usually open |
A. During the day if a plant has enough water |
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In many plants, stomata are found only on thee lower surface of the leaf. The most likely explanation for this fact is that |
D. Water loss would be less on the shaded lower surface thaan in direct sun |
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Which of the following statements is true? |
C. Oxygen cannot pass through stomata |
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The attraction of water molecules to other kinds of molecules is called |
A. Adhesion |
|
Through which plant structure does water move by capillary action? |
D. Xylem |
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