protista kingdom - ms. kube's webpage · protista kingdom protista are mainly unicellular...
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Protista Kingdom
Protista are mainly unicellular eurkaryotic cells that can be autotrophic or heterotrophic
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Protista are classified according to how they obtain food: fungi-like protista; plant-like
protista, and animal-like protista.
Classification of Protista
Slime Mold Algae Protozoans
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Plant-Like Protista Plant like protista
include algae,
diatoms, and kelp.
Phytoplankton
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Animal-Like Protista
Paramecium
Animal like protista include unicellular
paramecium and amoeba. Both are found in
pond water, streams, and rivers.
Amoeba
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Paramecium Paramecium are small, oval-shaped, unicellular
eukaryotes that are covered with cilia or hair-like
projections that help them swim through their aquatic
environment.
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Paramecium Paramecium also use their cilia to push food towards
its mouth, called an oral groove.
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Paramecium Once food is consumed, it is enclosed in a food
vacuole and moved towards a lysosome that
contains digestive enzymes to break down the food.
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Paramecium Contractile Vacuoles are used to expel excess water
from the cells.
Contractile Vacuole
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Paramecium also contain two types of nuclei. The
micronucleus contains the hereditary chromosomes
and the macronucleus contains a subset of the DNA
that is actively used to code for protein production.
Paramecium
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Amoeba Amoeba are small, unicellular, eukaryotes that are
capable of changing their shapes.
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Amoeba Amoeba move by shifting their cytoplasm to form
pseudopods or “false feet”
Pseudopods
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Amoeba Amoeba also create pseudopods to engulf their prey
and enclose them into a food vacuole so digestive
enzymes can break down the food.
Amoeba eating
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Euglena Euglena are unicellular eukaryotes that are both
plant-like, because it can photosynthesize, and
animal-like because it can move and eat.
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Euglena Euglena move with the help of a flagellum.
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Euglena At the base of the flagellum is an eyespot that can
detect light so the euglena can move toward the light
to photosynthesize using their many chloroplasts.
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Euglena When light is not available for photosynthesis, they
can eat other Protista or bacteria by engulfing them.
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Contractile Vacuole Each of these protista cells contain a contractile
vacuole that removes excess water from the cell.
Since these unicellular organisms live in fresh water
environments, too much water can enter the cell by
osmosis, causing the cell to burst.
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