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Which one of the following statements is true about xylem in plants?
It is responsible for the transport of water and characterised by sieve elements like parenchyma cells and sclereids.
It is responsible for the transport of water and characterised by sieve elements like parenchyma cells and sclereids.
It is responsible for the transport of assimilates in the vascular plants and characterised by tracheary elements
It is responsible for the transport of assimilates in both vascular and nonvascular plants.
Answers (1)
Xylem is a complex tissue in plants that is responsible for the transportation of water and minerals from the roots to the rest of the plant. It is composed of various cell types, including tracheary elements like tracheids and vessel elements. These tracheary elements are specialized cells that have thickened secondary cell walls and are involved in water conduction. They are characterized by their elongated shape and the presence of pits or perforations in their cell walls, which allow for the movement of water between adjacent cells. The presence of sieve elements and parenchyma cells, as mentioned in option a, is characteristic of phloem tissue, which is responsible for the transportation of organic molecules. Hence, the correct answer is option 1.
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