Protists Flashcards
are the most diverse of all eukaryotes.
Protists
one celled “first” “animals”
Protozoa
primitive “first” “plants”
Protophyta
all one-celled eukaryotic organisms
were classified as
Protists
that are not plants, animals, or fungi”.
all eukaryotic
cells
Protozoa = one celled “first” “animals” and
• Protophyta = primitive “first” “plants”
• Then, all one-celled eukaryotic organisms
were classified as protists.
• Now, the group is considered “all eukaryotic
cells that are not plants, animals, or fungi”.
Once upon a time
Most protists (Habitat)
are aquatic.
are organisms that drift or swim near
the surface of the water.
Plankton
are protists that include phytoplankton (autotrophs) and zooplankton (heterotrophs).
Microplankton
Microplankton are protists that include
phytoplankton (autotrophs) and zooplankton
(heterotrophs).
are responsible for half of the world’s photosynthesis and O2
production
Phytoplankton
Low plankton levels
Blue
Medium plankton levels
Olive
High plankton levels
Green
Is the most diverse
The protist kingdom
Some protists are
Unicellular while others are multicellular
The wide variety of protists have so many characteristics that made difficult to classify, but scientists develop a method to classify into 3 separate categories
Animal-like, plant-like (algae), fungus
Animal-like and feed on bacteria and smaller protists
Amoeba
Animal-like protists that live in fresh water feed on bacteria and smaller protists
Paramecium- paramecia
Are unicellular algae that lives in fresh water and can make its own food in presence of sunlight
Euglenoids Euglena
Are heterotrophs and use spores to reproduce
Fungus-like protists like fungi (slime mold)
may be autotrophic,
heterotrophic, or mixotrophic
organisms:
Protists
Photosynthetic: plant-like
Autotrophic
Ingestive: animal-like
Heterothropic
Absorptive: fungus-like
Heterotrophic
combine
photosynthesis and food ingestion.
Mixotrophic organisms
move with
cilia….They belong to a group known
as the Ciliates or Ciliaphora
Some Protozoa
help protists to swim and capture
food
Cilia
Many protists
have
a
contractile vacuole…..a
pump that will
contract and pump excess
water out of the cell.
use pseudopodia for movement & feeding.
Some protists
are “false” “feet” or cellular extensions that
may bulge from almost anywhere on the cell. Typically
occurs in heterotrophs, such as the Sarcodines, like
Amoebas.
Pseudopodia
Amoeba extends pseudopodia around food particle
until they join, enclosing the particle in a membrane-bound vesicle.
A lysosome merges with the new food vacuole, dumping its
enzymes in to digest the food. The products of digestion are then
absorbed through the membrane.
Phagocytosis
Algae are plantlike protists.
Plantlike protists can be single-celled or multicellular.
Plantlike protists
are a large group of plantlike
protists.
Euglenoids
have one or
two flagella.
Mostly photosynthetic
are a large group of plantlike
protists. Mostly photosynthetic, have one or
two flagella.
Euglenoids
moves toward the light, has a red
eyespot, which is light sensitive, movement
known as a positive phototropism.
Euglena
………….moves toward the light, has a ………….
which is light sensitive, movement
known as a ……………..
Euglena………red eyespot…….positive phototropism.
are
classified by their
pigments
Multicellular algae
Algae pigments
Green algae, brown algae kelp, red algae
