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Protists (What are Protists (Diatoms are only one of the vast variety of…
Protists
What are Protists
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Protists are eukaryotes that cannot be classified as animals, plants, or fungi. Because they're so different from one another they are known as "odds and ends" kingdom.
The word that best describes protists is diversity. Most protist are unicellular but some are multi. Some are heterotrophs but some are autotrophs, and others are both. Some cannot move while others can zoom around.
Because of the great variety of protist, scientists have proposed several ways of grouping these organisms. One way is grouping them into animal-like protists, plant-like protists and fungus-like protists.
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 protist (aka protozoans) are unicellular
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Plant-like Protists
Plant-like protists (aka algae) are autotrophs like plants. So most are able to use the sun's energy to make their own food. Some examples of Plant-like protists include...
Diatoms- unicellular, glasslike cell walls, some float near the surface of lakes or oceans, other attack to objects such as rocks in shallow water, food source for heterotrophs, ooz chemicals out from slits and then glide in slime. When they die make good polishing agent and are used in household washing items.
Dinoflagellates- unicellular algae surrounded by stiff plates, com in different colors, many glow in dark
Euglenoids- Green, unicellular algae that are found mostly in fresh water. They can be heterotrophs under certain conditions. They need light to make food
Red Algae- They are long red algae that divers have found growing more than 260 meters below the ocean's surface. This is used in many everyday things: hair conditioner, ice cream
Green Algae- Contain green pigments, unicellular, but some are multi-cellular, they live in fresh water and salt water, they live on land.
Brown Algae- Many different colors, Atlantic coast, commonly called seaweed
They play a significant role in many environments. Eg. algae that live near surface of ponds, lakes and oceans are an important food source for other organisms in the water. Also much of the oxygen in the Earth's atmosphere is made up of algae.
Algae very in size-- some unicellular and some multicellular. They also exist in a wide range of colors b/c they contain many different pigments
Funguslike Protists
Slime mold- Brightly colored, live on forest floors
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