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प्रश्न
Identify the following diagram, label it and prepare a chart of characteristics.
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उत्तर
Structure of stomata:
- Small gateways in the epidermal cells are called as stomata.
- Stoma is controlled or guarded by specially modified cells called guard cells.
- These guard cells may be kidney shaped (dicot) or dumbbell shaped (monocot), collectively called as stomata.
- Guard cells have chloroplasts to carry out photosynthesis.
- Change in turgor pressure of guard cells causes opening and closing of stomata, which enables exchange of gases and water vapour.
- Stomata are further covered by subsidiary cells.
- Stoma, guard cells and subsidiary cells form a unit called stomatal apparatus.
APPEARS IN
संबंधित प्रश्न
Answer the following question.
A fresh section was taken by a student but he was very disappointed because there were only a few green and most colourless cells. Teacher provided a pink colour solution. The section was immersed in this solution and when observed it was much clearer. What is magic?
Answer the following question.
While observing a section, many scattered vascular bundles could be seen. Teacher said, in spite of this large number the stem cannot grow in girth. Why?
Answer the following question.
Student while observing a slide of leaf section observed many stomata on the upper surface. He thought he has placed slide upside down. Teacher confirmed it is rightly placed. Explain.
Draw a neat labelled diagram.
T. S. of Dicot leaf
Draw a neat labelled diagram.
T. S. of dicot stem
Write the information related to the diagram given below.
Identify the following diagram, label it and prepare a chart of characteristics.
Identify the following diagram, label it and prepare a chart of characteristics.
Identify the following diagram, label it and prepare a chart of characteristics.
Distinguish between dicot and monocot leaf on the basis of following characters.
| Characters | Dicot leaf | Monocot leaf |
| Stomata | ||
| Intercellular space | ||
| Venation | ||
| Vascular bundle | ||
| Mesophyll cells |
