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प्रश्न
The diagram below represents a structure found in a leaf.
Study the same and answer the questions that follow:
(i) Name the pis labeled A and B.
(ii) What is the biological term for the above structure?
(iii) What is the function of the part labeled A?
(iv) Mention two structural features of A, which help in the function mentioned in (iii) above.
(v) Where is this structure likely to be found in a leaf?
(vi) The above structure helps in the process of transpiration. Explain the term transpiration.
(vii) How many other cells are found surrounding this structure as seen in the diagram?
उत्तर
(1) A—Guard cell B—Stoma.
(ii) Stomatal apparatus.
(iii) Regulates opening & dosing of Stomata.
(iv) It gives rigidity and protection to the cell.
(v) On the epidermis of the leaf.
(vi) Transpiration is the loss of water as water vapours from the aerial parts of the plant.
(vii) Five.
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संबंधित प्रश्न
How do stomata differ from a lenticel?
Name the following:
The process of getting rid of excess water in the form of water vapour through the stomata.
State the Location:
Stomata
Write the functional activity of the following structure:
Stomata
Mark the most appropriate answer in the following:
In the mechanism of opening and closing of stomata, the important factor is
Choose the Odd One Out
Name the following:
The openings on the barks of trees through which transpiration occurs.
The upper layer of mesophyll in a leaf consists of elongated ground tissue called ______.
The given figure represents an experiment:
- Leaf A was coated with grease on both surfaces.
- Leaf B was coated with grease on the lower surface.
- Leaf C was coated with grease on the upper surface.
- Leaf D was left without any application of grease. All four leaves A, B, C and D were left in a room for about 24 hours.
- Which leaf dries first? Give reason.
- Which leaf dries last? Give reason.
Given below is the figure of a stoma. Study the same and answer the following questions:
- Label the guidelines A and B.
- Write the exact location of the above-mentioned structures.
- Mention one important role of structure A.
- Write three important roles for structure B.
- Redraw the same figure when structures A are in flaccid condition. When does the flaccid condition occur?
