Question

Epidermal cells are often modified to perform specialized function in plants . Name some of them and functions they perform.

Answer 1

the following epidermal cells are found in plants

i) cuticle
they reduce surface transpiration

ii) stomata
Exchange of gases anf transpiration

iii) Stem Hair
For reducing temperature changes and rate of transpiration.

iv) Glan.dular hair
various secretions

v) pric.kles
protects from grazing animals .

vi) Root hair
Absorbs water .

Answer 2

Epidermal cells are often modified to perform specialized function in plants. Some of them are:-

 1) Tri chomes - Epidermal in origin, these are either unicellular or multi cellular. These are of two types:- hair and scales. It is thought to be in plant defense against insects.

i) Stinging hair - protect plant from herbivores.
ii) Glandular hair - produce essential oils.
iii) Aerial hairs - protect plant against sudden changes of temperature.
iv) Root hairs - take part in absorption of water and minerals.

2) Stomata - Exchange of gases.

3) Emergences - Protect plant from excessive transpiration, grazing animals and sometimes help in climbing.