Protozoa

General characteristics

unicellular; microscopic; no germ layers, tissues, or organs; specialized intracellular organelles

locomotion

pseudopodia, flagella, cilia

symmetry

all 4 types (radial, spherical, bilateral, asymmetrical

phylum amoebazoa (3)

pseudopodia, heterotrophs

• amoeba

• arcella

• difflugia

naked (no test), asymmetrical

amoeba

clear test

arcella

structured test

difflugia

Phylum euglenozoa

1-2 flagella, autotrophic and heterotrophic

• euglena

• trypanosoma

autotroph

euglena

heterotroph, causes sleeping sickness

trypanosoma

phylum plantae

flagellated single or colonial organisms, autotrophic

• volvox

has daughter colonies

volvox

phylum dinoflagellata

typically 2 flagella, mostly autotrophic, marine and freshwater species, bioilluminesce, may bloom

• ceratium

phylum apicomplexa

no locomotor structures, all parasitic, asexual reproduction

• plasmodium

causes malaria

plasmodium

phylum ciliophora

cilia, usually 2 sizes of nuclei, heterotrophic, sexual reproduction usually by transbinary fission

• paramecium

• vorticella

• stentor

…

paramecium

looks like a funnel, attached to substrate by a stalk

vorticella

thicker stalk than vorticella

stentor