What have we studied so far? Bacteria Archaea Eukarya Eubacteria Archaebacteria Protista Fungi Plantae Animalia Domains & Kingdoms

Kingdom Protista... First group of organisms to have a nucleus (eukaryotic). They are not animals, plants, or fungus

Kingdom Protista... Most are unicellular Amoeba Euglena Paramecium

A few are multicellular Kingdom Protista... A few are multicellular Kelp Brown Algae

Kingdom Protista... Protists have no specialized systems. They do everything within a single cell. Paramecium eating Red yeast Amoeba eating paramecium

Types of Protists Protists are Grouped by how they get energy. They can be Heterotrophic Autotrophic Symbiotic

Heterotrophic Protists eat other organisms Heterotrophic Protists eat other organisms. They are classified by how they move:

Flagellates move with a whip-like tail called a flagella.

Ciliates move with many cilia or hairs

Dangerous Ameba Utube video

Amoebas change their shape making cytoplasmic projections called Pseudopods. Amoeba – performing phagocytosis (engulfing food) Similar to our white blood cells

Amoeba phagocytosis

Passive protists don’t move at all, they depend on air or water to carry them.

A second type of protist are the Symbiotic protists. They form a relationship with another organism.

Some are mutualistic- both organisms are benefited. Coral(an animal) and Zooxanthellae(a protist) help each other to survive

Trichonympha protists live in the intestines of termites, helping them digest wood.

Some protists are parasitic and are responsible for some of the world’s most deadly diseases! Trypanosoma- causes African Sleeping Sickness

Protozoan Diseases Malaria Severe flu-like symptoms to coma and death, carried by the mosquito

Protozoan Diseases Amoebic dysentery Fever, stomach cramping. Dehydration Water-borne pathogens Giardia Cryptosporidium

Naegleria fowleri, the brain-eating amoeba that causes primary amebic meningoencephalitis

Autotrophic Protists Unicellular algae and multicellular algae Get their energy by photosynthesis Produce half of the world’s oxygen

They are the base of most aquatic food chains Ecological Roles- photosynthetic protists play an important role on earth They are the base of most aquatic food chains

Provide energy for coral Some protists live inside coral and provide food for it’s survival

Giant Kelp Forests

Provide shelter Autotrophic protists help recycle sewage

Red Tide Algal Bloom- protist grow to enormous numbers and then disrupt the normal ecosystem—reduce amount of oxygen Red Tide

(Algin and Carrageenan)