DIFFERENCES BETWEEN ANIMALS AND PLANTS 223 



mine satisfactorily whether to call an organism an animal or 

 a plant. 



Metazoa and Metaphyta. With the multiplication of cells 

 and their differentiation we find that the distinction between 

 animal and plant at 

 once becomes marked, 

 until there is no longer 

 any similarity between 

 them. Indeed, in all 

 organisms above the 

 Protozoa and the 

 Protophyta, the two 

 kingdoms are sharply 

 separated, all multi- 

 cellular organisms be- 

 ing either so distinctly 

 like plants or like ani- 

 mals that the difficulty 

 of distinguishing them 

 disappears entirely. 

 From this point up, 

 plants usually not only 

 possess chlorophyll, 

 but also show a gen- 

 eral structure which 

 indicates that they 

 are adapted for the 

 absorption of gases 

 from the air, of water 

 from the soil, and for 



the purpose of carrying on the process of photosynthesis; while 

 animals have a structure of body adapted for taking only solid 

 or liquid food. The difference in the shape of the animal 

 and plant body becomes so well marked that there is no longer 

 any confusion between them. Even though we find large 



FIG. 104. DROSERA, A CARNIVOROUS PLANT 



Small insects are captured by the hairs on the leaves, 

 digested, and, in a measure, assimilated by the plant. 



