Page 5 - Lesson Notes

 In desert plants, epidermis and cutin (a water proof waxy substance secreted

by epidermis) are thicker to reduce loss of water due to transpiration.
2. Cork Simple Tissues

 These types of tissue consist dead cells with no intercellular spaces.

 They form the outer layer of old tree trunks.
 Cork cells have a chemical called suberin in their walls that makes them

impervious to gases and water.

 Cork tissue protects plants from injuries, germs and water loss.
 Cork being light in weight is used for making several products like bottle

stoppers and shuttle cork.