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algae - Coggle Diagram
algae
diversity of algae
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Algae are classified using three criteria: pigment type, method of food storage, and cell wall composition.
Phylum Bacillariophyta
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They store food as oil, making them a nutritious food source and buoyant in water.
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Dinoflagellates
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Predominantly unicellular, with two flagella at right angles to one another, causing the dinoflagellate to spin as it moves.
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Some are autotrophic, some are heterotrophic
Some are bioluminescent, meaning they emit light
Dinoflagellates
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Red tides can be a serious threat to humans and the ecosystem because the dinoflagellate involved produces a toxin.
The toxin is ingested by shellfish, which are then ingested by humans.
The ecosystem is affected through reduced light penetration, toxin levels, and reduction in primary producers to the food web.
Euglenoids
Phylum Euglenophyta, euglenoids, are unicellular plantlike protists.
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Most euglenoids photosynthesize, but do not have a cell wall; they can also be heterotrophs.
Chrysophytes
Phylum Chrysophyta, chrysophytes, are yellow-green or golden-brown algae.
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Most chrysophytes are unicellular, but some are colonial.
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Brown algae
Phylum Phaeophyta contain the brown algae, some of the largest and most plantlike multicellular algae.
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Green algae
Phylum Chlorophyta, green algae, are photosynthetic organisms that have much in common with plants.
Can be unicellular, multicellular, or colonial
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includes the most common species of algae found in North American freshwater,
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Red algae
Phylum Rhodophyta, red algae, contains mostly multicellular organisms.
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Phycobilin absorbs blue and violet light that penetrates deeper into the water, allowing red algae to live in deeper water than other algae.
used to thicken puddings, syrups, and shampoos