ORGANS OF VEGETATION 147 



4. Make a seed tester. Test the rapidity of germination of several kinds 

 of seed. Determine the amount of moisture needed. 



QUESTIONS 



1. Name the principal parts of the plant. 



2. Describe the root and its growth. 



3. Describe the stem. 



4. Name the classes of stems. 



5. Discuss the leaves and their functions. 



6. Calculate the amount of water probably exhaled daily by the grass in 

 a pasture of fifty acres. 



7. Discuss the discoveries of Priestley and Ingenhousz. 



8. Discuss the effect of colored lights on the decomposition of carbon 

 dioxide by the leaves. 



9. Discuss the power of leaves to radiate heat. 



10. Describe the flower and its parts. 



11. Discuss pollination. 



12. What is (a) close fertilization, (6) cross fertilization, (c) hybridization ? 



13. Describe (a) the seed, (6) the kernel, (c) the embryo. 



REFERENCES 



Botany All the Year Round, Andrews. 



Lessons in Botany, Gray. 



Plant Life on the Farm, M. T. Masters. 



