TB 



THE EVOLUTION OF MAN 



reached the climax of its consistency. The first 

 throbs of" the machine are still the same among 

 all animals, man included. What can that mean ? 



Haeckel here made a significant suggestion. 

 All animals from the lowest to the highest come 

 out of one single cell. According to Haeckel, 

 this indicates that the most primitive ancestor of 

 all animals consisted all his lifetime of one single 

 cell. It requires no great stretch of imagination 

 to conceive such a uni-cellular animal. Even in 

 our day thousands of animal species are living, 

 every individual of which consists of one single 

 cell. Why should not such creatures have lived 

 at the time when all evolution began on the 

 earth? 



Among all classes of animals, the embryonic 

 development begins with the fission of the one 

 cell into many cells. This is exactly the way in 

 which the present genuine uni-cellular creatures 

 propagate themselves. Whenever one of these 

 uni-cellular creatures is ready to propagate itself, 

 it simply splits up into two, four or twenty pieces, 

 as the case may be, and every one of these pieces 

 in its turn becomes a new uni-cellular individual. 

 Haeckel thinks that those primitive uni-cellular 

 structures follow the same method, propagated 

 in this way. But occasionally the offspring would 





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