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Protists (Plant- like Protists (Diatoms (Unicellular, glass-like cell…
Protists
Plant- like Protists
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Autotrophs, like plants, most of them are able to use the sun's energy to make their own food. Some are multicellular and some are unicellular.
Diatoms
Unicellular, glass-like cell walls
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Many diatoms ooze slime out of the slits in their cells, they then glide on the slime to move around.
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Dinoflagellates
Unicellular, surrounded by stiff plates that look like armor, they exist in a variety of different colors.
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Euglenoids
Green and unicellular, and mostly found in fresh water.
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Red Algae
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Their red pigment is really good at absorbing the small amount of light that reaches the deepest part of the ocean.
Green Algae
Most are unicellular, but few are multicellular.
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Brown Algae
Has a plant- like structure, and flourishes in cool rocky waters.
Animal- like Protists
Like animals, animal- like protists are heterotrophs, and most are able to move from place to place to obtain food
But unlike animals, animal- like protists (protozoans) are unicellular, while animals are multi cellular.
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Protozoans With Cilia
Another group of animal- like protists are the ciliates, they have structures called cilia. Cilia look like hair- like projections that move in wave- like motions.
Ciliates use their cilia to move and obtain food. The cilia act like oars, and the movement sweep food in to the organism.
The cells of ciliates are complex, they have 2 nuclei, the larger one is for everyday tasks and the smaller on it for functions in reproductions.
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Sometimes paramecia reproduce by conjunction, this happens when 2 paramecium join together and exchange some of their genetic material.
Protozoans With Flagella
They are protists that use long, whip- like flagella to move. A flagellate may have more than one flagella
Some of these protozoans may live inside the bodies of other organisms. For example one type of flagellate lives in the intestines of termites.
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What is a Protist?
Protists are Eukaryotas that cannot be classified as animals, plants, or fungi.
The members of the protists kingdom are very different from each other, so they are known as the "odds and ends" kingdom.
Despite being very different, they all have the characteristic of living in moist surrounding.
Protists are very diverse, some are unicellular or multi cellular, and autotrophs or heterotrophs, and some move around a lot while some can't move at all.
Because the members of the Protist Community are very different scientist developed a way to group these organisms in to 3 different groups: animal- like protists, plantlike protists, and fungi-like protists.
Fungus- like Protists
Fungus- like protists are heterotrophs, have cell walls, and use spores to reproduce. All fungus- like protists are able to move during some point in their lives
Slime Molds
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They live on forest floors and other moist, shady places
They ooze along the surfaces of decaying materials, feeding on bacteria and other microorganisms
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