30 MINUTE MARVELS OF NATURE 



that all life is akin. No isolated and unconnected 

 instances occur, although it is not always perhaps 

 possible to link up our chain and trace direct 



Fig. 19. A lowly aquatic alga, showing the early stages in 

 the evolution of the plant stem (Draparnaldia] 



connection between the beginning and the end. 

 Yet surely there is enough evidence to show that 

 Nature is one harmonious whole. Breaks which 

 are difficult to explain may occur here and there, 



