Protozoans are animal-like protists that can cause diseases like giardiasis and amoebic dysentery when ingested through contaminated water or food. Algae are also protists that are currently being grown for biofuel as some varieties like blue-green and brown algae are 50% oil and can be harvested and processed into fuels like diesel and gas that could eventually replace fossil fuels.

3. *Protozoan
*Algae
*Fungus

4. Animal-like Protists: Protozoans

23. *Economic Benefits
Blue-green and brown algae is
currently being grown for
fiofuel, which could eventually
replace traditional fossil fuels.
Living algae is 50 percent oil,
and can be harvested and
processed into usable oil, diesel
and gas fuel.

25. *Giardiasis
This disease is caused by the
protist giardia, which is one of the
most frequently found waterborne
parasites in the United States.
Infection typically occurs after
drinking contaminated water, usually
from a lake, stream or well.

27. *AmoebicDysentery
This affliction is caused by the
amoeba Entamoeba histolytica
and is transmitted similarly to
giardiasis, infecting the host
through ingestion of
contaminated water or food.