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Question
Describe structure of root hair.
Solution
- Root hair is a cytoplasmic extension (prolongation) of epiblema cell.
- Each root hair may be approximately 1 to 10 mm long and tube-like structure.
- It is colourless, unbranched, short-lived (ephemeral), and very delicate.
- It has a large central vacuole surrounded by a thin film of cytoplasm, plasma membrane, and thin cell wall, which is two-layered.
- Outer layer is composed of pectin and the inner layer is made up of cellulose.
- Cell wall of a root hair is freely permeable but the plasma membrane is selectively permeable.
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