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प्रश्न
Write the information related to the diagram given below.
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उत्तर
- 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.
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.
A student was observing a slide with no label under a microscope. The section had some vascular bundles scattered in the ground tissue. It is a section of a monocot stem! He exclaimed. No! it is a section of fern rachis, said the teacher. Teacher told to observe vascular bundle again. Student agreed, 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
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.
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 |
