In General Usually unicellular Reproduction: Some asexual, some sexual, some both Kingdom for life that doesn’t fit in animals, plant or fungi kingdom.

In General• Usually unicellular• Reproduction: Some

asexual, some sexual, some both

• Kingdom for life that doesn’t fit in animals, plant or fungi kingdom

• Mostly aquatic life• 3 main categories

• AKA: Protozoans• Basic Features:

– Aquatic, unicellular– Heterotrophic: pathogens, parasites,

predators

• Classified by how they move:1) Pseudopods : move w/

pseudopodia (false- feet)– Engulf by phagocytosis– Ex: Amoebas

2) Flagellates: move w/ flagella– Ex: Zooflagellates

3) Ciliates: move w/ cilia– Ex: Paramecia

Animal-Like Protista

Amoeba (Pseudopod)

Flagellates Moving

Ciliates

Animal-Like Protista & Disease

• Malaria– Cause: Plasmodium– Vector: mosquitoes– Effects in humans:

Fever, vomiting, coma, death

Plasmodium injected by mosquito bite

Plasmodium develop inside your liver

Plasmodium reproduce inside your RBCs

Plasmodium reenters mosquito when bitten

Animal-Like Protista & Disease

• Malaria– Cause: Plasmodium– Vector: mosquitoes– Effects in humans:

Fever, vomiting, coma, death

• Sleeping sickness– Cause: Trypanosoma – Vector: tsetse flies– Effects in humans:

Coma & death

Trypanosoma injected by tsetse bite

Trypanosoma multiplies and bursts from cells

Trypanosoma reenters tsetse when bitten

Plantlike Protista• AKA: Algae• Most unicellular; No leaves,

stems, roots• Perform photosynthesis with

chloroplasts• Classified by their type of cell wall1) Euglenoids: use flagella to swim

– Animal & plant-like2) Dinoflagellates

– Most plankton – Basis of aquatic food chains

3) Diatoms– Glasslike shells– Provide ~ ½ the O2 on earth

Euglena

Fungus-like Protista• Basic Features:

– Decomposers: absorb nutrients

– Live in moist environments

• 2 major groups:1) Slime Molds

– large (~1 meter) single celled mass of cytoplasm

– Fungus-like (absorbs food)– Animal-like (can move)

2)Water molds: can be parasitic– Ex: Potato blight: caused Irish

potato famine (1840’s)

Cool Slime Mold Video

Protista: The Origins of Multicellular Life

• Some protista are…• 1) Single-celled

– Live by themselves• 2) Colonial

– Group of independent acting cells

– No specialized cells• 3) Multicellular

– Cells specialized to be specific jobs

• Importance: Ancestors of multicellular life

Unicellular EuglenaThis is a colony of cells called Volvox

Multicellular Kelp

Kingdom Protista

Animal-like

1.Pseudopods• Move with

false feet

2.Flagellates• Move with

flagella

3.Ciliates• Move with cilia

Plant-like

1.Diatoms• Glass-like

shells

2.Dinoflagellates• Plankton

3.Euglenoids• Move like

animals, autotrophs like plants

Fungus-like

1.Slime molds• Move like

animals, absorb food like fungi

2.Water molds• Often parasites• Responsible

for Irish Potato Famine

Kobe Kuiz• 1) Name the three categories of protista.• 2) Which category of protista has members that are able to

move?• 3) Which category of protista has members that absorb

nutrients?• 4) Which category of protista has members that are

heterotrophs?• 5) Which category of protista has members that hunt?• 6) How does a pseudopod, flagella, and cilia differ?• 7) Name the 3 major categories of protozoa.• 8) Name the 3 major categories of algae.• 9) Name the 2 major categories of fungus-like protista.