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Root hairs ar...

Question

Root hairs are unicellular or multicellular.explain?

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Solution

Root hair is unicellular epidermal hair. It is a tubular outgrowth of epidermal cell that absorbs water and mineral salts.

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Q. The root hairs are always unicellular and unbranched in the plant kingdom except ..................... roots where they are multicellular.

Q. Which one of the following statement is/are false?
(i) Epidermal cell has small amount of cytoplasm and a large vacuole
(ii) Waxy cuticle layer is absent in roots
(iii) Root hairs are unicellular, while stem hairs/trichomes are multicellular
(iv) Trichomes may be branched or unbranched, soft or stiff and prevent transpiration
(v) Guard cells are dumbell shaped in dicots and bean-shaped in monocots

Q. Find the incorrect statements from the following.
A. Roots hairs are multicellular elongations of the epidermal cells.
B. Trichomes are unicellular epidermal hairs of the stem.
C. Guard cells are specialized cells regulating the opening and closing of stomata.
D. Cuticle, collenchyma and stomata are absent in roots.

What are root hairs? What is the significance of root hairs? [2 MARKS]

Q. Assertion :Root hairs are present on whole root
surface Reason: Root hairs absorb water.

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