why epidermis is called protective tissue and why epidermis of desert plant is covered with waxy substance ?
Epidermis is the first layer of the body of both plants and animals that acts as the first line of defense against various types of harmful objects. It protects the other parts of the body from injuries, bacterial attacks etc. For this reason, epidermis is known as protective tissue. The desert plants are covered with waxy cuticle layer to avoid excess loss of water through transpiration due to excess heat.