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HEREDITY 



The struggle for existence is portrayed by the meadow mouse, sur- 

 Struggle for rounded by its many enemies and yet continuing to main- 

 Existence tain an existence by virtue of its great birth-rate. 



The simpler features of the laws of Heredity as elucidated by Mendel 

 and his followers are illustrated by the inheritance of 

 seed-coat color in the common pea, the color of sweet 

 peas, and the coat-color of rats. 



Return to the elevator* and ascend to the second floor. 



Heredity 



ENLARGED MODEL OF A RADIOLARIAN 



