560 THE CHANGING WORLD OF LIFE 



Thus, serology gives us another valuable tool to help unravel the 

 mysteries of biological evolution. The findings of serology, in general, 

 have upheld the conclusions which have been drawn from the other 

 fields which we have surveyed. The many evidences together show us 

 that evolution of living things has occurred and is occurring without 

 any question. They also indicate that this evolution has been very ex- 

 tensive in scope. 



REVIEW QUESTIONS 



1. Compare individual adaptation with species adaptation. 



2. How is the number of offspring produced related to the rapidity of natural 

 selection ? 



3. How is it that sexual selection may sometimes be beneficial and sometimes 

 harmful to the race? 



4. How does artificial selection compare with natural selection in its methods 

 and results obtained? 



5. What is the relation betwen mutation and natural selection? 



6. Discuss the various evidences of evolution from different branches of biology. 



7. We say that without mutation evolution would be very limited in scope. 

 Explain. 



8. Explain the technique of serological comparisons of two animals which appear 

 closely related. 



