What are the main functions of the epidermis in plants?
BiologyClass 9CBSEAnswered 13 May 2026
Answer
The epidermis is the outermost protective layer of plant organs like leaves, stems, and roots. Its main functions include:
1. Protection: Protects underlying tissues from mechanical injury, pathogen invasion, and excessive water loss.
2. Regulation of gas exchange: Contains stomata (in leaves and young stems) for the exchange of oxygen, carbon dioxide, and water vapor.
3. Absorption: In roots, epidermal cells form root hairs for water and mineral absorption.
4. Secretion: May secrete protective substances like wax (cuticle).
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