CHAPTER VII 

 ADAPTATIONS FOR THE PRESERVATION OF THE SPECIES 



A. Methods of Reproduction 



I. The Simple or Asexual Method of Reproduction 



Materials. 



Slides or diagrams,, showing a dividing amoeba, a divid- 

 ing Paramecium, a dividing vorticella, reproduction in 

 some form of sporozoa, budding hydra, gemmules of 

 spongilla, and some species of worm as Dero or Nereis in 

 the process of dividing. 



Definitions. 



Spore, a cell capable of developing into a new organism. 



Asexual reproduction, reproduction by division of the cell 

 or body. 



Sexual reproduction, reproduction by means of the con- 

 jugation of two reproductive cells known as the egg and 

 sperm cells. 



Fertilization, the fusion of the male or sperm cell with 

 the egg or female cell. 



Ovary, an organ producing eggs. 



Spermary, an organ producing sperm cells. 



Cross fertilization, fertilization in which the sperm and 

 egg cells are produced by different individuals. 



Dioecious, the different kinds of reproductive organs 

 found in different individuals. 



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