Protistans - Bi Sci 001 Friday February 5, 1999...

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Bi Sci 001 Friday February 5, 1999 Announcements: Lecture notes: Protistans This class has a lot of membranes that have importance in our lives: 1. Some infect us. 2. Some poisons us. 3. Some infect/infest/poison our pets, livestock and property. 4. Some are photosythetic. 5. Some provide useful products. 6. They are invaluable in the food chain. Protista: Main Characteristics Mostly single celled, some multicelled membranes. Some are photosythetic. Some are heterotrophic. * There are many arguments about the bouinderies of the Kingdom. ** The members sometimes form aggregates which are multicelled - which further confuses the issue. Algae (means aquatic plant) Red Algae ( both Red and Brown Algae are "Seaweeds") Brown Algae * Algin comes from brown species. * Agar comes from one red species. * They all have chlorophyll, but other pigments mask the color. Green Algae * are most similar to land plants. * They have cholroplasts. * They store carbohydrates as starch and have cellulose reinforced cell walls. * There are a few single-celled members.
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Mold-Like Protists Slime Molds * 1. All are heterotrohs. 2. They form masses that differentiate into spore bearing structures.
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Protistans - Bi Sci 001 Friday February 5, 1999...

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