Kingdom Protista
Kingdom Protista
 Eukaryotic
 Heterotrophic,
(but some autotrophic)
 Living freely and/or
Parasites
 Microscopic
 Mostly Unicellular
Plankton
 Free
living protozoa and algae
that drift in the water
 Microscopic in size
 Used by larger organisms
that filter feed the water
for food
Plankton
Plankton
AMOEBA
 Bottom
dwelling scavengers that
feed on decaying matter in the
water.
Amoebas
Movement – by pseudopodia cytoplasmic extensions that blob
“Amoeboid movement”
 Feeding – surrounds food with
pseudopodia and engulf the
food by phagocytosis.


Reproduction- binary
fission.
Diagram an AMOEBA, label structures
PARAMECIUM
– by cilia, short hair-like
projections-for movement & acquiring
food.
 Feeding –cilia sweep food down
the oral groove to the
mouth pore of paramecium.
 Movement
PARAMECIUM
Paramecium Binary Fission
Asexual Reproduction
Paramecium Conjugation
Sexual Reproduction
Symbiotic Relationships
– Relationship between
different species living in close
association with one another.
 Example: Trichonympha live in the
digestive tract of termites. One of the
few organisms that can digest
cellulose (cell wall) and thus utilize
glucose for energy
 Symbiosis
Trichnympha
Illnesses caused by Protists
African Sleeping Sickness
transmitted by the tsetsee fly which
live only in Africa
Illnesses caused by Protists
 Giardia
“Hiker’s Diarrhea” –
carried by muskrats and
beavers, transmitted when we
drink contaminated drinking
water
Illnesses caused by Protists
Illnesses caused by Protists
– carried by an infected
mosquito and transmitted when
a mosquito bites. The parasitic
plasmodium uses the mosquito
as its vector.
 Malaria
Illnesses caused by Protists
Plasmodium Life Cycle (Malaria)
CHLAMYDOMONAS
 Unicellular
green algae. They
are common in the soil, fresh
water and streams.
CHLAMYDOMONAS
Volvox
Volvox – Are
green algae
that live in large
round colonies.
(colonial)
Diatoms
– golden brown algae.
Walls of diatoms contain shells.
These shells never decompose
(animal dies), the diatom shell sinks
and forms a layer of material called
diatomaceous earth (used as an
abrasive in silver polish, detergents,
paint and insulators)
 Diatoms
Diatoms
DINOFLAGELLATES
–bioluminescent
algae. “fire algae”
 Can produce red tides - large
populations of dinoflagellates (algal
blooms). Water looks red and
contains nerve toxins. Infects
shellfish, fish - can become deadly if
eaten.
 Dinoflagellates
Dinoflagellates
EUGLENAS
– flagellum.
 Feeding - Contain chlorophyll, but
are not completely autotrophic.
 Has an eyespot that functions as a
light detector.
 Movement
EUGLENA
End of the Road for Protista