160 SOME REACTIONS AMONG ANIMALS 



5. A tendency to live without self-activity is inherited 

 among men, due to the desire to live at the expense of others. 

 What is meant by the term " beggar " ? 



Conclusions. 1. Show how a beggar is a human parasite, 

 and therefore a degenerate. Should he be helped without any 

 return ? Explain. Note. Persons unable to provide for them- 

 selves are taken care of by society, and hence are riot obliged 

 to beg. 



2. Explain how an idle or pampered person may lose the use 

 of some of his powers. 



3. Show how men should not seek to withdraw from the 

 competition of life. 



4. Which sort of life should give the most pleasure and 

 satisfaction to a normal human being, an idle life, or an 

 active life ? Explain. 



5. Is a man who inherits large sums of money and invests 

 it and lives on the income, a parasite ? Explain. 



6. Is a boy who hinders teachers in class work, by inatten- 

 tion, whispering or disorder, a parasite ? Explain. 



Questions 



1. Distinguish between social and communal life, and give 

 examples of each. 



2. How may parasitic habits have been acquired ? 



3. Name some parasites of domestic animals. 



4. What is an intermediate host ? 



5. What are the advantages of communal life ? 



6. Explain the use of the terms symbiosis or commensal- 

 ism. 



7. Show that division of labor is the basis of communal 

 life. 



8. W T hy must parasitic worms produce their young in great 

 numbers ? 



9. Name some of the more dangerous parasites to man. 



