62 PLANT GROWTH AND NUTRITION 



Summary. — We have learned : 



1. That seeds, in order to grow, must possess a food supply 

 either in or around their embryos. 



2. That this food supply contains starch, fats, and proteins. 



3. That this food supply must be oxidized before energy is 

 released. 



4. That in cases where the food is not stored at the point where 

 it is to be used, the food must be digested, so that it may be 

 transported from one part of the plant to another. 



The life processes of plants and animals, so far, may be considered 

 as alike ; they feed, take in oxygen, release energy, and grow. 



Problem Questions 



1. What conditions outside a seed are necessary to make it grow? What 

 conditions inside the seed? 



2. What are organic foods? Inorganic foods? How do plants differ 

 from animals in the use of food ? 



3. Of what use might food tests be to a boy or girl ? 



4. Compare an engine with a plant or an animal. In what ways are they 

 alike? 



5. How do corn grains and bean seeds differ? In what respects are they 

 aUke? 



6. What is digestion? How is it brought about? Of what use is it to a 

 plant ? To an animal ? 



Problem and Project References 



Hunter, Laboratory Problems in Civic Biology. American Book Company. 



Atkinson, First Studies of Plant Life. Ginn and Company. 



Coulter, Barnes, and Cowles, A Textbook of Botany, Part I. American Book 



Company. 

 Dana, Plants and Their Children. American Book Company. 

 Densmore, General Botany. Ginn and Company. 

 Duggar, Plant Physiology. The Macmillan Company. 

 Hodge, Nature Study and Life, Chap. XXX. Ginn and Company. 

 Lubbock, Flowers, Fruits, and Leaves. The Macmillan Company. 

 Moore and Halligan, Plant Production. American Book Company. 

 Transeau, General Botany. World Book Company. 

 United States Department of Agriculture Year Books will give project refer- 



