EXERCISE 109 (Continued) 



From the table of distribution above, answer the following 

 questions : How wide is the variation in this group of ears ? 

 Are the variations great enough to be of practical importance? 

 How largely would the yield be affected if all the ears were 

 like the smallest? if all were like the largest? In what groups 

 do most of the ears fall ? Which ears would probably be selected 

 for use in an effort to improve the breed of corn ? 



On cross-section paper make a graph representing the facts 

 shown on the table above. 



References 



BERGEN and CALDWELL. Practical Botany, pp. 413, 414, 417, 418. 

 BERGEN and CALDWELL. Introduction to Botany, pp. 173, 174, 181-184. 

 CALDWELL and EIKENBERRY. Elements of General Science, pp. 290- 



302. Ginn and Company. 

 DAVENPORT. Domesticated Animals and Plants, chap. viii. Ginn and 



Company. 



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