Question:
Root hairs arise from _______.
Root hairs arise from _______.
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Think of the outermost layer of the young root, also called the piliferous layer.
Updated On: Jul 4, 2026
- cortex
- pericycle
- endodermis
- epiblema
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The Correct Option is D
Solution and Explanation
Step 1: The outermost single layer of a young root is called the epiblema or piliferous layer.
Step 2: Certain cells of this epiblema layer, called trichoblasts, elongate outward as tubular unicellular extensions to form root hairs, which absorb water and minerals.
Step 3: Cortex lies beneath epiblema, endodermis is the innermost cortical layer, and pericycle lies just inside endodermis, none of them produce root hairs. So epiblema is correct.
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