108 ONE-CELLED ANIMALS— PHYLUM PROTOZOA 



8. How is the amoeba able to withstand unfavorable environmental conditions ? 



9. What is the distinguishing characteristic of the class Mastigophora? 



10. What is meant by the term pathogenic? Name two pathogenic protozoa, the 

 diseases caused by each, and the means of spread of each disease. 



11. How does euglena differ from most other forms of animal life? 



12. Explain the difference in locomotion of euglena and trypanosoma. 



13. Describe two uses of the cilia in Paramecium. 



14. What results would you expect if the macronucleus were removed from 

 Paramecium ? 



15. What are trichocysts and how are they used? 



16. Why would you not expect conjugation among a group of paramecia that 

 had descended from a single individual through repeated fission ? 



17. How do the contractile vacuoles of Paramecium differ from those of the 

 amoeba ? 



18. Trace the Plasmodium cycle within a human body. 



19. Trace the Plasmodium cycle within the mosquito's body. 



20. Discuss methods of malaria control. 



21. Why is spore production an unusual characteristic of animals? 



22. Name the four classes of Protozoa, the distinguishing features of each class, 

 and representative genera under each. 



