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What is the role of epidermis in plants?

Updated On: Jan 19, 2026
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Solution and Explanation

The epidermis is the outermost layer of cells in plants and it plays several important roles:

  • Protection: It protects the plant from mechanical injury, pathogens, and water loss.
  • Prevents Water Loss: The epidermis is often covered with a waxy layer called cuticle that reduces evaporation.
  • Gas Exchange: It contains stomata, which help in the exchange of gases (O₂ and CO₂) during photosynthesis and respiration.
  • Absorption: In roots, the epidermis has root hairs which increase the surface area for water and mineral absorption.
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Top Questions on Plant Tissues

Questions Asked in CBSE Class IX exam

(Street Plan) : A city has two main roads which cross each other at the centre of the city. These two roads are along the North-South direction and East-West direction.

All the other streets of the city run parallel to these roads and are 200 m apart. There are 5 streets in each direction. Using 1cm = 200 m, draw a model of the city on your notebook. Represent the roads/streets by single lines. There are many cross- streets in your model. A particular cross-street is made by two streets, one running in the North - South direction and another in the East - West direction. Each cross street is referred to in the following manner : If the 2nd street running in the North - South direction and 5th in the East - West direction meet at some crossing, then we will call this cross-street (2, 5). Using this convention, find: 

(i) how many cross - streets can be referred to as (4, 3). 

(ii) how many cross - streets can be referred to as (3, 4).

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