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The Manufacture of Food 35 



PROBLEMS 



1. How do the white parts of a variegated leaf get food? 



2. Occasionally in a field of young corn a stalk that lacks chlorophyll will be 

 found. This white stalk dies as soon as the food supply in the grain from 



which it came is exhausted. Why? 



3. Geraniums with variegated leaves occasionally produce branches that are 

 entirely white. A noted horticultural firm offered $1000 to any one of its 

 gardeners who would root one of these branches and thus produce a white- 

 leafed geranium. What was the chance for success ? Why ? 



