EMBRYOLOGY. 



Evolutionists rely much of late upon embryology 

 in trying to establish the truth of their theory. 

 Embryology treats of the structure and the develop- 

 ment of the animal in the egg. 



All animals are divided into two divisions with 

 regard to their method of reproduction; namely, the 

 Protozoa and the Metazoa. The Protozoa do not 

 produce true eggs, while the Metazoa produce eggs. 



The Protozoa are the simplest of all animals, con- 

 sisting generally of a minute speck of protoplasm, 

 ranging in size from less than 1 /iooo of an inch to more 

 than an inch in diameter. They reproduce by the 

 division of an individual into two organisms. The 

 nucleus, which is the center of physiological action, 

 first divides, forming two nuclei, and each of these 

 serves as a center for the new individual. A proto- 

 zoan is commonly regarded as being a nucleated cell. 



The Metazoa reproduce by means of eggs which 

 must be fertilized by spermatazoa. A metazoan is 

 always composed of more than one, and generally of 

 many cells. The cells that compose the body are of 

 more than one kind, each tissue of the body being 

 composed of cells peculiar to itself, and adapted to 

 perform a special kind of work. 



The Metazoa may also propagate by budding. Dr. 

 Romanes claims that the asexual reproduction by 

 budding among the Metazoa "is ultimately due to 

 their propagation by sexual methods," so that with- 



141 



