Algae Tony Li and Bryan Eng. Parts of an alga Thallus: seaweed body Holdfast: anchors the alga Stipe: stemlike part used for support Blade: leaflike,

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Presentation transcript:

Algae Tony Li and Bryan Eng

Parts of an alga Thallus: seaweed body Holdfast: anchors the alga Stipe: stemlike part used for support Blade: leaflike, photosynthesis

Kelp/Brown Algae All are multicellular. Found in cool water along temperate coasts. Accessory pigments in chloroplasts cause brown color. Uses: food, thickeners for processed foods, lubricants Giant Kelp

Red Algae Reddish color: phycoerythrin pigment. Warm coastal waters of tropical oceans, up to 260 m. Carageenan (cell wall): food thickeners. Food. Red algae

Green Algae Pigments in chloroplasts similar to those in plants. Most live in fresh water. Both unicellular and multicellular species. Lichen: algae and fungi Volvox Euglena

Alternation of Generations n Haploid multicellular organism (gametophyte) n n Gametes Fertilization 2nZygote 2n Mitosis Meiosis n n Spores Mitosis Diploid multicellular organism (sporophyte)

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