THE NATURE AND NEEDS OF LIVING MATTER 27 



Home Work (Optional*). Apply the above tests to potato, eggs, 

 bread, butter, and beans, and tabulate your results as follows : 



Put a check in the above tabulation wherever a nutrient occurs in any 

 of the foods listed for testing. Does any one of the above foods contain 

 all of the nutrients ? 



Questions 



1. What is a food ? 



2. Name the nutrients in foods. 



3. Give some examples of each of the nutrients. 



4. Where do plants get their nutrients ? 



5. Where do animals get theirs ? 



6. How test for the different nutrients ? 



References 



Hunter, Essentials of Biology. Chap. II. American Book Company. 



Hunter, Elements of Biology. Chap. II. American Book Company. 



Davison, The Human Body and Health (Advanced). Chap. V. 

 American Book Company. 



PROBLEM IV 



An Introduction to the nature and work of living 

 organisms. 



Materials. Specimens of any ordinary flowering plant, such 

 as a buttercup or butter and eggs (linaria). Somewhat similar 

 greenhouse plants may also be used, as a geranium or primula. 

 Living insects, as locusts. 



