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Question
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
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
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Solution
The correct option is D (v) only
A root hair is the minute structure generally, present on the stem and the roots. It is a tubular outgrowth of a trichoblast, a hair-forming cell on the epidermis of a plant root.
The trichomes often cover the plant body and are the result of divisions of epidermal cells. Trichomes may be either unicellular or multicellular and are either glandular, consisting of a stalk terminating in a glandular head, or nonglandular, consisting of elongated tapering structures.
Guard cells are specialized cells regulating opening and closing of stomata. Guards cells are kidney shaped in dicots and dumbell shaped in monocots.
Epidermal cells are generally parenchymatous and have small amount of cytoplasm with a large vacuole.
Cuticle, collenchyma, and stomata are absent in roots. Leaf epidermis and stem epidermis are both covered by a waxy cuticle, but absent in root epidermis. Because roots lack a cuticle, so that they can absorb water and nutrients freely from the soil.
Therefore, the correct answer is option d.
A root hair is the minute structure generally, present on the stem and the roots. It is a tubular outgrowth of a trichoblast, a hair-forming cell on the epidermis of a plant root.
The trichomes often cover the plant body and are the result of divisions of epidermal cells. Trichomes may be either unicellular or multicellular and are either glandular, consisting of a stalk terminating in a glandular head, or nonglandular, consisting of elongated tapering structures.
Guard cells are specialized cells regulating opening and closing of stomata. Guards cells are kidney shaped in dicots and dumbell shaped in monocots.
Epidermal cells are generally parenchymatous and have small amount of cytoplasm with a large vacuole.
Cuticle, collenchyma, and stomata are absent in roots. Leaf epidermis and stem epidermis are both covered by a waxy cuticle, but absent in root epidermis. Because roots lack a cuticle, so that they can absorb water and nutrients freely from the soil.
Therefore, the correct answer is option d.
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