8 INTRODUCTION 



they are composed of organs plants (and animals also) 

 are said to be organized, and are called organisms. For a 

 similar reason, the kingdom of living things is called the 

 organic kingdom, or the organic world. 



FIG. 2. Kohlrabi, showing the stem modified as an organ for the storage 

 of food, and a well developed tap-root. 



14. Root and Shoot. Everyone knows that the plants 

 with which we are best acquainted have roots in the 



