1. What are some characteristics of organisms in the Archaezoa phylum?

2. Motile by flagella Lack mitochondria

3. What are two pathogenic organisms that belong to the Archaezoa phyla?

4. Trichomonas vaginalis Giardia lamblia

5. What is the causative agent of amoebic dystentery?

6. Entamoeba histolytica

7. What are some characteristics of organisms in the Apicomplexa phylum?

8. Obligate intracellular parasites Non-motile in mature form Complex life cycle usually involving multiple hosts

9. What are three pathogens that belong to the Apicomplex phylum?

10. Plasmodium species Cryptosporidium Toxoplasma gondii

11. What disease is caused by Plasmodium?

12. Malaria

13. Define definitive host for a protozoan.

14. Host where sexual reproductive cycle takes place

15. What is the definitive host for Plasmodium?

16. Anopheles mosquito

17. What phylum does Trypanosoma brucei belong to?

18. Euglenozoa It is a hemoflagellate

19. What type of organism has a scolex and proglottids?

20. Platyhelminth – the cestodes or tapeworms

21. What type of organism is Trichinella spiralis?

22. Roundworm or nematode