2. What did Lamarck mean by the disuse and use of organs?
3. How did Lamarck think new characteristics were obtained by animals?
4. Did Lamarck give an explanation of how organisms changed over a period of time?
5. What did Wallace mean by his statement, "The life of wild animals is a struggle for existence"?
6. Wallace said that "useful variations will tend to increase, unuseful or hurtful variations to diminish." How could this happen?
7. What evidence or example does Wallace give?
8. How does Wallace's explanation differ from Lamarck's?
9. How did Darwin come up with his ideas about the origin of species?
10. What did Darwin say was the cause of the origin of new species?
11. Which paper was easiest to read and understand, Lamarck's, Darwin's, or Wallace's? Why?