INTRODUCTION 



29 



holding a sunflower in one hand and a frog in the other has no 

 difficulty in determining which is animal and which is plant. The 

 distinctly typical animal forms depend on green plants for their 



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existence. All organic animal food is derived either directly or 

 indirectly from the process of photosynthesis carried on by green 

 plants to manufacture starch which is stored in plant tissue. Green 

 plants by effect of their chlorophyll (green pigment) in sunlight 



