LIVING MATTER 63 



QUESTIONS 



1. In what parts of your body is there growth ? In what parts of the 

 tree's body ? 



2. In what parts of your body is there movement ? In what parts of 

 the tree's body ? 



3. In what parts of your body is there irritabihty ? In what parts of 

 the tree's body ? 



4. How is division of labor to be seen in your body ? in the trees ? 



5. How is adaptation to be seen in your body? in the tree's body? 



6. What makes possible these similarities between two things that 

 are so different from each other as are a human body and a tree ? 



7. What makes possible all the difference that we see between two 

 different kinds of organisms ? 



8. How does protoplasm resemble the white of an egg ? How does 

 it differ from the white of an egg ? 



9. How does a one-celled organism multiply itself ? 



10. How does the one-celled stage of a bean plant become a many- 

 celled bean plant ? 



11. How do the results of cell division in a one-celled organism differ 

 from the results of cell division in a many-celled organism ? 



12. Why can we not see the protoplasm of common living things ? 



13. What parts of your body are not alive ? What is the source of 

 these non-living parts ? 



14. How do different kinds of cells differ from each other ? 



15. What different kinds of tissue can you recognize in a plant with- 

 out the use of a microscope ? What kinds in an animal ? 



REFERENCE READINGS 



Hough and Sedgwick. The Human Mechanism, pp. 43-47. 



Wilson, E. B. The Cell, pp. 17-30 (extract in C. H. Ward's "Exploring 



Nature," pp. 190-197). 

 Huxley, T. H. Methods and Results, Essay 3, The Physical Basis 



of Life. 

 Densmore, H. D. General Botany, chap, iii. The Cellular Structure of 



Plants; chap, iv, Historical Sketch of the Cell and the Cell Theory. 

 Cockerell, T. D. a. Zoology, chap, ii, The Living Substance; chap, iii, 



The Cell and its Activities. 



