PROBLEM 4. Theories about the Origiu of Kinds of Living Thi?igs 563 



7. Look back to Figure 509. How would Lamarck have explained the 

 origin of the giraffe species from an ancestor like the okapi? Hi?Jt: Assume 

 there was a shortage of food in the part of the world where the okapi 

 lived. Which part of your explanation sounds reasonable? Which part are 

 you unable to accept? 



Further Activities in Biology 



1. Prepare a short talk on Lamarck. Deliver it to the class. Consult D. C. 

 Peattie's Green Laurels. 



2. The story of Darwin's life is fascinating because he never lost his 

 courage in the face of a lifelong illness. Prepare a report on the way he 

 worked. You will find the Life and Letters of Charles Darwin, by his son, 

 interesting. 



3. If you keep Drosophila in your school laboratory or at home you 

 can test the theory of the inheritance of acquired characters. Keep Dro- 

 sophila in darkness to find out whether they will still respond to light. 

 What will be your control? 



4. You can see the results of evolution in the many species of such 

 genera as Viola (the violets), Aster, Solidago (the goldenrods), and Ra- 

 juinciihis (the buttercups). If you live where there are fields and woods 

 collect specimens of these groups and arrange them to show similarities 

 and differences. 



