Classify Protozoa into subclasses and list diagnostic features of Apicomplexans. Name diseases and distinguish features of Opalina vs. Paramecium.

7a. Re-arrange the following Protozoa into their different sub-classes.

Sub-class	Protozoa
Coccidia	Cyclospora, Eimeria, Toxoplasma, Cryptosporidium
Haemosporidia	Plasmodium
Piroplasmia	Babesia

7b. List three (3) diagnostic features of the Apicomplexans.

1. Presence of an apical complex at some stage of their life cycle, used for host cell invasion.
2. All are parasitic.
3. Lack of locomotor organelles (like flagella or cilia) in adult stages.

8a. Name the diseases associated with the following Protozoa.

• I Entamoeba histolytica: Amoebiasis
• Ii Giardia lamblia: Giardiasis
• Iii Balantidium coli: Balantidiasis
• Iv Eimeria tenella: Coccidiosis
• V Plasmodium vivax: Malaria

8b. Distinguish four (4) differences between Opalina and Paramecium in their features.

Opalina	Paramecium
1. Multinucleate (many identical nuclei).	1. Binucleate (macronucleus and micronucleus).
2. Lacks contractile vacuoles.	2. Possesses contractile vacuoles.
3. Lacks a cytostome (mouth).	3. Possesses a distinct oral groove and cytostome.
4. All cilia are uniform and cover the body.	4. Cilia are often differentiated (e.g., oral cilia).
5. Primarily found in amphibian intestines.	5. Primarily found in freshwater.