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प्रश्न
What are tracheary elements? Describe their functions.
उत्तर
Tracheary elements are the elongated cells of xylem tissue. They are of two types:
(i) Vessels: These are long tube-like structures that are formed by a row of cells placed end to end. The transverse walls between the vessel elements are completely dissolved forming water pipes.
(ii) Tracheids: These are elongated cells with tapering ends. Since their end walls have closed ends, water has to pass from cell to cell via pits.
Both these elements are involved in the conduction of water.
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संबंधित प्रश्न
Identify the type of tissue in the vascular bundle.
How does the cork act as a protective tissue?
What is simple tissue? Classify and explain its different types with suitable diagram.
Differentiate between cells of Parenchyma and Collenchyma.
Differentiate between cells of Meristematic tissue and Permanent tissue
Differentiate between cells of Sclerenchyma and Parenchyma
Study the diagram given below and then answer the question that follows:
State the function of the parts labelled 1, 2, 3 and 4.
The question has four answers. Choose the correct answer:
A component of xylem is
The question has four answers. Choose the correct answer:
The parenchymatous tissue is
Match the column (A) with the column (B)
| (A) | (B) | ||
| (a) | Parenchyma | (i) | Thin walled, packing cells |
| (b) | Photosynthesis | (ii) | Carbon fixation |
| (c) | Aerenchyma | (iii) | Localized thickenings |
| (d) | Collenchyma | (iv) | Buoyancy |
| (e) | Permanent tissue | (v) | Sclerenchyma |
