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Protists

Protists. Miss Schwippert Biology. I. What are Protists ?. A. (Mostly ) uni -cellular EUKARYOTES that evolved around 2 billion years ago. They are very diverse and can seem similar to Plants, Animals, and Fungus. We will look at 3 specific examples: EUGLENA PARAMECIUM AMOEBA.

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Protists

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  1. Protists Miss Schwippert Biology

  2. I. What are Protists? A. (Mostly) uni-cellular EUKARYOTES that evolved around 2 billion years ago. They are very diverse and can seem similar to Plants, Animals, and Fungus. • We will look at 3 specific examples: EUGLENA PARAMECIUM AMOEBA

  3. http://www.youtube.com/watch?v=a4aZE5FQ284 I. Paramecium • Transport: moves using CILIA (tiny hair like projections). CILIA can also help them grab food. • Excretion: uses its contractile vacuoles to excrete water/waste. • Respiration: uses diffusion to get oxygen (aerobic) • Nutrition: Heterotrophic (eats bacteria, algae) Engulfs food using its cilia which enter through the oral groove. The food is packed into a vacuole and enzymes break it down. Waste leaves via anal pore. • Reproduction: Sexual via conjugation OR Asexual using budding • Growth and development: none really they can “grow” by uptaking excess water/food • CAN USE CHEMOTAXIS/PHOTOTAXIS TO ORIENT IN THEIR ENVIRONMENT

  4. http://www.youtube.com/watch?v=7pR7TNzJ_pA II. Amoeba • Transport: moves using PSEUDOPODS which can also help them grab food. • Excretion: uses its contractile vacuoles to excrete water/waste. • Respiration: uses diffusion to get oxygen (aerobic) • Nutrition: Heterotrophic Engulfs food using its pseudopods which break fold inward to create a vacuole. Enzymes break it down. Waste leaves via diffusion. • Reproduction: Asexual using mitosis • Growth and development: none really; they can “grow” by uptaking excess water/food • CAN USE CHEMOTAXIS/PHOTOTAXIS TO ORIENT IN THEIR ENVIRONMENT

  5. III. Euglena http://www.youtube.com/watch?v=fI7nEWUjk3A • Transport: moves using a FLAGELLA. • Excretion: uses its contractile vacuole • Respiration: uses diffusion to get oxygen (aerobic) • Nutrition: Mainly photosynthetic (BECAUSE IT HAS EATEN ALGAE) using chloroplast but can engulf food, if needed • Reproduction: Asexual using Mitosis • Growth and development: none really they can “grow” by uptaking excess water/food • CAN USE PHOTOTAXIS TO ORIENT IN THEIR ENVIRONMENT

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