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प्रश्न
A long tree has several branches. The tissue that helps in the side ways conduction of water in the branches is
पर्याय
collenchyma
xylem parenchyma
parenchyma
xylem vessels
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उत्तर
xylem vessels
Xylem (a complex permanent tissue) is the chief conducting tissue of vascular plants responsible for the conduction of water and inorganic solutes. The tissue is composed of four kinds of cells: tracheids, vessels (or tracheae), xylem parenchyma, and xylem fibers. Vessels and tracheids help in the long-distance vertical conduction of water and minerals from the roots to different parts of the shoot system. The main stem along with all of its branches are all supplied with water and mineral by mean of xylem vessels and tracheids. Radial conduction i.e., sideways conduction of water occurs by xylem parenchyma.
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संबंधित प्रश्न
Describe various types of epithelial tissues with the help of labelled diagrams
Based on the following information, identify the three types of epithelial tissue in the figures given below :
| a |  |
b |  |
c |  |
(1) Cuboidal epithelium: It consists of a single layer of cuboidal cells.
(2) Columnar epithelium: It is composed of tall, cylindrical cells with oval nuclei usually placed at the base of the cells.
(3) Ciliated epithelium: It consists of cells being hair-like cilia on their free surface.
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Reason: Blood vessels are absent in epithelial tissue.
Mention the type of epithelium seen in the alveoli of lungs.
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Classify and describe epithelial tissue on the basis of structural modifications of cells.
