Presentation on theme: "Kingdom Protista. What is a Protist? unicellular or multicellular anything except plants, animals, or fungi 65,000 species Autotrophs, heterotrophs,"— Presentation transcript:
Plant like Protists algae autotrophs Mostly unicellular Unicellular to very large Produce most of the oxygen on earth - photosynthesis
Plant like Protists Used to make a variety of products As a thickening agent in puddings, ice cream Used as food for animals (processed)
Diatoms Important food source in oceans Shells are made of silica – used to make glass Form diatomaceous earth diatomaceous earth abrasive and used in detergents, toothpaste, insecticides, etc.
IMPORTANCE OF PROTISTS ECOLOGICAL ROLES Provide an essential food base in aquatic food chains Carry out more than 30-40% of Earth’s photosynthesis Protozoans help keep the number of bacteria in check