36 



POSITION— RELA T ION SHIPS 



Further, the chemical composition of bacteria is more like 

 that of other fungous plants than of any of the forms 

 classed as animals. 



Fig. 13. — Spherical bacteria. 

 Several pairs are shown. 



Fig. 14. — Yeast cells. Some show 

 typical budding. 



The food of bacteria is always taken up in solution by 

 diffusion through the outer covering of the cell as it is in all 



vJE'^^f ^I; '." itv ever surround and engulf particles of 

 z:z: them within the cell as many single- 



FiG. 15. — A portion of the mycelium of a mold. Note the large size and 

 the branching. 



celled animals do, and as the leukocytes and similar ame- 

 boid cells in practically all multicelled animals do.^ 



One of the most marked differences between animals and 

 plants is with respect to their energy relationships. Plants 



' Myxomycetes excepted, and they are probably to be regarded as animals 

 • — ^Mycetozoa. 



