390 PROGRESSIVE DEVELOPMENT 



7. How would Lamarck, Darwin, and de Vries explain the fact 

 that horses in the north have longer hair than horses in the south ? 



8. How would Lamarck, Darwin, and de Vries explain the fact 

 that the ancestors of giraffes had short necks and present-day giraffes 

 have long necks ? 



9. Discuss the formation of the earth. 



10. How have scientists been able to determine, even approxi- 

 mately, the age of the earth? 



1 1 . What is one of the estimates given of the age of the earth ? 



12. Discuss the formation of different types of fossils. 



13. Name five lines of evidence given to support the theory of 

 organic evolution. 



14. Discuss the relation of the age and formation of strata of rocks 

 to the fossils found in them. 



15. In outline form give the sequence of fossils found in rocks be- 

 ginning with the fossils first found and going through those found in 

 youngest rocks. What relation does this sequence bear to the sim- 

 plicity and complexity of the animals ? 



16. Name three different types of mammals and give the distin- 

 guishing characters of each type. 



17. Discuss the geographical evidences of evolution. 



18. What is the importance of the expeditions to the Mongolian 

 desert? 



19. Give examples of morphological evidences of evolution? 



20. What are vestigial evidences of evolution? Give examples. 



21. What are embryological evidences of evolution? Give ex- 

 amples. 



22. Discuss the evolution of plants. 



23. Discuss coal formation. 



24. Give a report on the life and work of Lamarck, Charles Darwin, 

 and de Vries. 



25. Look up and report on one of the Mongolian expeditions. 



SUPPLEMENTARY READINGS 



Haupt, Arthur W., Fundamentals of Biology (McGraw-Hill Book Co.). 



Holmes, S. J., General Biology (Harcourt, Brace & Co.). 



Jewett, F. G., The Next Generation (Ginn & Co.). 



Osborn, Henry Fairfield, From the Greeks to Darwin (Charles Scribner's Sons) 



