Pieces of leaf epidermis were peeled from the plant Commelina communis. The pieces were then placed in a solution of a dye that binds to potassium ions. You would expect that most of the dye would be concentrated in theAsieve cells when the stomata are closed.Bguard cells when the stomata are closed.Cepidermal cells when the stomata are open.Depidermal cells when the stomata are closed.
Question
Pieces of leaf epidermis were peeled from the plant Commelina communis. The pieces were then placed in a solution of a dye that binds to potassium ions. You would expect that most of the dye would be concentrated in theAsieve cells when the stomata are closed.Bguard cells when the stomata are closed.Cepidermal cells when the stomata are open.Depidermal cells when the stomata are closed.
Solution
The correct answer is B. Guard cells when the stomata are closed.
Here's the step-by-step reasoning:
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Stomata are tiny openings or pores in plant tissue that allow for gas exchange. They are typically found in the plant's epidermis and are surrounded by guard cells.
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Guard cells control the opening and closing of stomata by expanding or shrinking in response to changes in environmental conditions.
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Potassium ions play a crucial role in the opening and closing of stomata. When the concentration of potassium ions increases in the guard cells, water flows into the cells, causing them to swell and the stomata to open. Conversely, when the concentration of potassium ions decreases, water flows out of the guard cells, causing them to shrink and the stomata to close.
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Therefore, when the stomata are closed, the concentration of potassium ions in the guard cells would be low because the ions would have been released to allow the cells to shrink. Consequently, if the leaf epidermis were placed in a solution of a dye that binds to potassium ions, most of the dye would be concentrated in the guard cells.
Similar Questions
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Part A. These stomata are located in the lower epidermis of two leaves. What can be concluded by comparing image X to image Y?Select one:a.X is in a leaf releasing water or oxygen. Y is in a leaf during the night.b.X is in a leaf with a waxy cuticle to prevent overheating. Y is in a leaf that needs to protect its cells from freezing temperatures.c.X is in a leaf of a plant during a drought. Y is in a leaf facilitating photosynthesis.d.X is in a leaf that needs to release excess sugars. Y is in a leaf that needs to take in carbon dioxide.QUESTION 6Question textPart B. What evidence supports your answer to Part A? [B.2H]Select one:a.Stomata open when they have made too much sugar. They close when they have enough carbon dioxide inside the leaves.b.When stomata are open, water vapor and other gases are released into the atmosphere. They close at night when photosynthesis doesn't occur.c.Stomata open to take in more water when the environment is dry. They close to enable photosynthesis to occur.d.When plants get hot, stomata open to release heat. They close to hold present cold air from entering.
What is the function of stomata? Which cells open and close the stomata?
Underneath the leaves, there are very small holes called (stomata/cuticles) that allow air to get inside9. (Stomata/Cuticles) is a waxy coat that help plants keep water inside10. Inside the plant, there are tubes of dead cells called (xylem, phloem) that help transport water and minerals up and down the plant.11. Inside the plant, there are tubes of living cells called (xylem, phloem) that help transport sugars to areas of the plant that need it.12. The flower part called ‘sepal’ is usually (green/yellow) in colour
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