Which of the following is not part of epidermal tissue system
A
Trichomes
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B
Companion cells
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C
Guard cells
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D
Subsidiary cells
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E
Root hairs
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Solution
The correct option is B Companion cells The epidermis is a single layer of cells that covers the leaves, flowers, roots and stems of plants. It forms a boundary between the plant and the external environment and does not contain the companion cells.