ROOTS THEIR STRUCTURE AND FUNCTION 57 

 Adaptations of Roots: 



For penetration of soil: 



1. Protective cap. 



2. Growing point back of tip, for protection. 



3. Root hairs back of tip, for protection. 



4. Geotropism and hydro tropism (see next chapter). 



For storage: 



1. Large size. 



2. Protection in soil from cold, drought, and animals. 



3. Poisonous or bad tasting, to protect from animals. 



For support: 



1. Depth and extent of root system. 



2. Toughness of wood and bast fibers. 



3. Special brace roots, climbing roots, etc. 



NOTE. Look up cypress "knees," and adventitious roots of banyan tree. 



