PROTEIN-MAKING 



161 



it clogs up the conducting tubes and slows up the process of 

 food making. But at night the foods are changed into a soluble 

 form, transported to other parts of the plant, and the leaf is ready 

 to begin its wurk again with the shining of the sun. This building 



ligbt energy light energy 



food 



is 



carried 



special 

 tubes 



vateris 

 carried 

 to leaf 



by ' 



tubes 

 Connected 

 vith roots 



oxygen 



isjcriverz 

 N/hen 

 poet is 

 macte 



i 



^air enters* 

 Txath 

 carbon 

 ctioxicte^ 



C0 2 



The leaf food factory. Where is the light energy used? How do the raw materials get to the 

 factory ? Where do waste products go ? Where do the manufactured products go ? 



up of carbohydrates, with the release of oxygen by the chloroplasts 

 in the presence of sunlight, is called photosynthesis. 



Manufacture of fats. Inasmuch as tiny droplets of oil (or fat) 

 are found inside the chlorophyll bodies in the leaf, we believe that 

 fats, too, are made there, probably by a transformation of the 

 starch already manufactured. 



Protein-making and its relation to the making of living matter. 

 Protein is a part of the food which is necessary to form protoplasm. 

 It is present in the leaf and is found also in the stem and root. 



