Protists.

Protists

• eukaryotic, more than 200,000 species 3 main groups 1. animal -like 2.plant-like 3. fungus-like.
• a diverse group of eukaryotic microrganisms.
• plant-like.
• autotrophs, photosynthetic.
• euglena, diatoms, phytoplankton.
• algae: red, golden. green(volvox), brown(kelp). 
• animal-like.
• heterotrophs or parasites.
• paramecium, stentor, amoeba.
• harmful = cause malaria and sleeping sickness.
• fungus-like
• feed on decaying matter.
• absorb food through cell walls.
• some are parasites.
• slime molds and water molds.
• water mold caused the irish potato famine in the 1840s.