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Kingdom protista. Kingdom Protista. Scientists believe Protists paved the way for the evolution of plants, animals, and fungi. Can be unicellular, multicellular, or colonial. Characteristics. Large and complex cells that contain nuclei and other organelles Eukaryotes Unicellular - PowerPoint PPT Presentation
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KINGDOM PROTISTA
Kingdom Protista Scientists believe Protists paved the way
for the evolution of plants, animals, and fungi.
Can be unicellular, multicellular, or colonial
Characteristics Large and complex cells that contain nuclei
and other organelles Eukaryotes
Unicellular Plant-like producers
Autotrophs Animal-like consumers
Heterotrophs Have a cell wall Protozoans (animal-like) and Algae (plant-like)
Algae Plant-like mircroorganisms Make their own food Produce oxygen through photosynthesis More than 75% of oxygen on Earth is
produced by photosynthetic algae Most live in either salt or fresh water, but
some live on moist shady tree bark, wet concrete and rocks, or with a fungus as part of a lichen.
Green Algae Grows in large masses Create food photosynthesis
Example: Volvox is a colonial green algae
Diatoms Look like flying saucers Brittle shell-like wall Move by floating in currents, or attach
themselves to larger floating surfaces. When they die they fall to the bottom of
the sea floor A build up of these dead diatoms is
called diatomite which is used to make pool filters and tooth paste
Protozoans Protozoan means “first life” Because they must find their food they
must be able to move about. Some have no means of locomotion so they
often get transported as a parasite and cause diseases.
Responsible for malaria Example protozoans:
Amoeba Paramecium
Amoeba A protozoan that uses a flowing motion
to move and pursue its prey. Have pseudopodia which means “false-
foot”
Paramecium Protozoans with hair-like cilia that work
like tiny oars.
Euglena A unique type of algae because it has
characteristics of both protozoans and green algae. Autotrophic like algae Can also be hetertrophic when light is low
which is a characteristic of protozoans. Mobile Uses a whip-like flagella to move
around and get light/food.
Slime Molds Once considered fungi Re-classified because they can move Made of individual cells Look like big blobs Get food by creeping along and
gathering food particles as they move If you cut them into pieces, they will
move themselves back together.
Water Molds Live in wet areas
Example: mildew