Kingdom Protista

The Odds and

Ends Kingdom

Characteristics of Protists

Eukaryotes

Autotrophic, Heterotrophic or both

Multicellular and Unicellular

Reproduce sexually and asexually

Live in moist surroundings

Some can move some cannot

Three Groups of Protists

Scientists divide protists into

categories based on characteristics

they share with organisms in other

kingdoms

Animal-Like protists

Plantlike protists

Funguslike protists

Animal-Like Protists

Called animal like because

they are heterotrophs

they are able to move from place to place to

obtain food

Another name for animal-like protists is

Protozoans

Why not animals?

they are unicellular

4 groups of Animal-Like Protists

Grouped based on how they move and live

Protozoan with Pseudopods (false foot)

Protozoan with Cilia

Protozoan with Flagella

Protozoan that are parasites

Protozoan with Pseudopods Pseudopods means False Foot

Example is an Amoeba

Protozoan with Cillia

Cillia-hair like projections from cells that

move with wavelike motion

Example is a Paramecium

Protozoan with Flagella

Flagella—whip like structure used to move

Live in symbiosis with other organisms

Sometimes helping host, sometimes hurting

Protozoan that are Parasites

Feed on the cells and body fluids of a host

Plasmodium is a protozoan that has more

than one host and causes malaria

Plantlike Protists

Commonly called algae

Autotrophs

Multicellular and unicellular

Reproduce sexually and asexually

Diatoms Unicellular

Glasslike cell walls

Dinoflagellates Unicellular

Variety of colors—many glow in the dark

Two flagella to move

Euglenoids Green, unicellular, found in freshwater

Autotrophs but can be heterotrophs when

sunlight is not available

Has an eyespot and a flagellum

Red Algae Almost all are multicellular

Red pigment helps them grow deeper in the

water

Used in products such as ice cream and hair

conditioner

In Asian cultures it is eaten fresh, dried, or toasted

Green Algae Very diverse

Green pigments

Most unicellular—some form colonies and a

few are multicellular

Most live in water, some on land

Ulva Colony

Brown Algae Commonly called seaweed

Multicellular

Contain brown, yellow, green, and orange

pigments

Bladders to float upright

Funguslike Protists

Heterotrophs with cell walls

Use spores to reproduce

Three types

Slime molds—live in moist soil

and decaying plants

Water molds and downy mildew—live in water and

moist places