EXERCISE 129 (Continued) 



Questions. 1. What differences besides those of temperature are there between summer and winter? 



2. How do these other differences influence the behavior of plants ? 



3. How do these other differences influence the behavior of animals ? 



4. How does the season's effect upon one group of organisms influence other organisms ? 



5. What practical use is made of the fact that certain organisms are inactive at low temperatures ? 



6. How does low temperature probably reduce the activity of protoplasm ? 



7. How does high temperature probably reduce the activity of living matter ? 



8. How does shortage of water influence the activity of protoplasm ? 



9. What practical use can be made of the fact that a shortage of water reduces protoplasm activity? 

 10. What practical use can be made of the fact that organisms change their habits with the seasons ? 



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