PLANTS AND ANIMALS. 49 



gram (Fig. 4) will give the student an idea of the relation 

 between the kingdoms. 



66. The Popular Distinctions Between Plants and Animals. 



We often think of motion or locomotion as a power 

 possessed by animals alone; but this is not a sufficient 

 distinction, for all plants have some parts capable of 



FIG. 4. A diagram to suggest the relations between plants and animals. 



Questions on Figure 4. In what respects are fungi intermediate be- 

 tween green plants and animals? Mention some of the doubtful 

 organisms which are difficult to classify strictly as plants or as 

 animals. 



motion, and some of the lower plants are gifted with 

 the power of locomotion, as in many of the lowest water 

 plants. Furthermore, many animals, fairly well ad- 

 vanced in the scale of life, are fixed and do not have the 

 power of locomotion in the adult stage. This is true of 

 the corals, some of the echinoderms, and the tunicates. 

 Again we have some unicellular organisms that have 



