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SEAWEED CHARACTERISTICS
Multicellular Eukaryotic Cells
Some 75% or more of the oxygen in the planet’s atmosphere is actually produced by photosynthetic algae and cyanobacteria.
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CLASSIFICATION
Generally consider members of the Protista kingdom
Some scientists want to reclassify them as plants especially green algae
Genetic studies and biochemical similarity indicate a need for reclassification of green algae.
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GENERAL STRUCTURE
Thallus- body of seaweed
Blade- leaf-like flattened portions
Holdfast- root-like structure that anchors thallus to substrate
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TYPES OF SEAWEED
Three types of Multicellular Seaweed
1. Green (Chlorophyta) 2. Brown 3. Red Algae
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GREEN ALGAE
Sea Lettuce(ulva)& Dead Man’s Finger (codium)
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BROWN ALGAE
Rockweeds (Fucus) - found Temperate Shores
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KELP FOREST - KELP FORESTS
Macrocystis- largest of the kelps- up to 100 m (330 ft) have been found
Kelp forests- very biological productive
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RED ALGAE
Irish Moss (Chrondrus) - North Atlantic Red Alga
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ECONOMIC IMPORTANCE
Seaweeds are edible- especially red and brown
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ECONOMIC IMPORTANCE CONT
Agar- From Red Algae. Used in canned meats. Also, by Biologists to grow microorganisms.