Protists are unicellular eukaryotic organisms that can be animal-like, plant-like, or fungus-like. They include protozoa such as amoebas and flagellates, as well as algae. Protists live in aquatic and moist environments and can be photosynthetic autotrophs or heterotrophic consumers. They vary greatly in appearance, functions, and impacts on humans and other organisms.

1. Protists are unicellular organisms that
have a nucleus.

2.  Unicellular
 One of the first groups of living things on Earth.
(1.5 billion years ago.)
 Microscopic
 Can cause disease.
 Can be parasites

3.  Has a nucleus.
 Live in watery environment.
 Generally live as individual cells.
 Protists vary greatly in appearance and
function.

4.  I. Animal-like Protists
 II. Plant-like Protists.
 III. Fungus-like Protists.

5.  Protozoan means “First Animal”.
 Cells contain a nucleus.
 Cells lack a cell wall.
 They are heterotrophs.
 Most can move on their own.

6.  1. Sarcodines (SAHR-koh-dighnz)
 2. Ciliates (SIHL-ee-ihts)
 3. Flagellates (FLAJ- ehl-ihts)
 4. Sporozoans (spohr-oh-ZOH-uhnz)

7.  Commonly called amoeba
 Have pseudopods (Greek:“false feet”)
 Pseudopods are used for movement and
to capture food.

8.  Contractile
Vacuoles: controls
amount of water
inside
 Food Vacuole:
where food is
digested.

10.  They feed on
bacteria and
other
protoctists.
 Phagocytosis

11.  Am0ebas
reproduce by
dividing into two
new cells (binary
fission).
 They are sensitive
to light and some
chemicals.

12.  ENTAMOEBA
HISTOLYTICA
 is an example of a
pathogenic amoeba
that can produce
ulcers on intestinal
walls and cause
amoebic dysentery in
humans

13.  Are
protozoans
that move
about by
means of
numerous
hairlike cilia..

14.  Free
swimming
ciliates
 Reproduce
by bf and
conjugatio
n

15.  Have a
Flagellum: a
long whip-like
structure used
for movement.
 Many live in
animals

16.  Based on the term spore, the infectious form in
which the organism is transmitted from one
host to another.
 Pass from one host to another.
 Pass from ticks, mosquitoes or other animals to
humans.

17.  Unicellular and Multicellular
 Colonies (groups of unicellular protists)
 Can move on their own
 Autotrophs: make their own food from
simple materials using light energy
(photosynthesis).
 Pigments: chemicals that produce color

18.  Euglenoids (yoo-GLEE-noydz)
 Diatoms (DIGH-ah-tahmz)
 Dinoflagellates (digh-noh-FLAJ-eh-layts)
 Red Algae
 Green Algae
 Brown Algae

19.  Green
 Unicellular
 Live in fresh water
 Autotrophs, but
can be
heterotrophs under
certain conditions.
 Flagella
 Eyespot: sensitive
to light.

20.  Unicellular
 10,000 living
species.
 Aquatic
 Glass like cell
wall

21.  Unicellular
 Cell walls are like
plates of armor.
 Two flagella
 Spins when it
moves.
 Colorful (pigments)
 Can glow in the
dark.
 Causes Red Tide

22.  Multicellular
seaweeds
 Live in deep ocean
waters
 Used for ice cream
and hair
conditioner
 Used as food in
Asia

23.  Most are unicellular
 Some form colonies
 Few are multicellular
 Can live in fresh and
salt water and on land
in damp places.
 Very closely related to
green plants.

24.  Commonly called
seaweed
 Can contain brown,
green, yellow,
orange and black
pigments.
 Attach to rocks
 Have air bladders
 Used as food
thickeners

25.  Heterotrophs
 Have cell walls.
 Many have flagella and are able to
move at some point in their lives.

26.  Live in water or moist
places.
 Tiny threads that look
like fuzz.
 Attack food crops
 Caused the Irish
Potato Famine.

27.  Reproduce by
Fruiting Bodies:
 The Fruiting Bodies
contain Spores.
 At first they look like
ameba, then later they
look like mold.
 Live on moist shady
places.
 Feed on bacteria and
other microorganisms.