VORTICELLA 65 



see, feel? Do they have nerves or brain? If the organs 

 needed for performing these functions in other animals are 

 absent in the protozoa, how can you account for the fact 

 that they do perform these functions? 



Is the protoplasm protected in any way? What means 

 of defense have they? How can one account for their wide 

 distribution and abundance? 



In what ways do these single celled animals differ from 

 the single cells of plants and of higher animals? In what 

 ways do they resemble each other? Could single cells from 

 the many-celled animals exist alone as do the Protozoa? 



Write a brief paper answering the questions above and 

 discuss the points suggested. 



