PROTOCOCCUS 



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Physiology. The nutrition of protococcus is similar to 

 that of the chlorophyll-bearing cells of all plants. The 

 green coloring matter manufactures various organic sub- 

 stances from carbon dioxide (CO 2 ) and water, starch being 



FIG. 1. Protococcus. I, mature plants; 2, cell divided; 3, 4, 5, G, cells 

 which after dividing adhere to form colonies of cells. 



produced most frequently. The assimilation of starch, its 

 breaking up and recombination with other elements such as 

 nitrogen, sulphur, and phosphorus to form protoplasm, is 

 accomplished by the living protoplasmic substance. 



