Transcript Slide 1
What is a microorganism? micro – very small; organism – living thing. A very small, living thing. Let’s look at examples of microorganisms. Bacteria Bacteria are single-celled organisms (made of one cell). They are found everywhere. What are bacteria? Science Pirates – Bacteria Song Bacteria – The Good, the Bad, and the Kinda Gross Bacteria come in three shapes. Round (coccus) Rod (bacillus) Spiral (spirillum) Some are producers. (Producer – makes own food) Other bacteria are consumers. (Consumer - Has to find food and eat it.) Beneficial uses of bacteria. Provide nitrogen for plants. Fixes the nitrogen (changes the nitrogen to a form the plant can use). Get minerals from ores. Help make antibiotics. Beneficial uses of bacteria. Used to make plastics and laundry detergents. Foods Yogurt Sauerkraut Pickles Olives Beneficial uses of bacteria. Foods Chocolate Cheese Soy Sauce Vinegar Ketchup Why Swiss Cheese Has Holes. Harmful effects of bacteria. Cause Diseases (<1% of bacteria cause diseases) Three ways to get disease. Through touch. Through air (breathe in). Eating contaminated food. Harmful effects of bacteria. Examples of bacterial diseases. Dental caries (cavities). Strep throat. Salmonella. Typhoid fever. Harmful effects of bacteria. Causes disease in farm animals. Causes metal to rust and wear away. Click here for Bacteria Eating the Titanic. Can Bacteria Get Sick? How to prevent diseases. Vaccinations. Antibiotics. Wash hands after using bathroom or whenever dirty. Cook food properly. How to prevent diseases. Store food properly. Cover mouth when sneezing, coughing. Click here for Germs. Click here for How Dirty are Bathrooms?` Click here for the Surprise Toothbrush. Click here for the Proper way to Use TP. Click here for the FiveSecond Rule. When you see a pond, you see a lot of life! Much of it, you can’t see! Photo source: Hobo’s Pond B&B It’s too small for you to see. To see it, you will need a microscope. This is the world of the protozoan (protist). Photo source: University of Winnipeg, Dr. Simmons’ protist webpage All protists live in water. Click here for Intro to Protists. Let’s examine three different examples of protozoans. The Amoeba The amoeba is among the most primitive of all organisms. The amoeba has an irregular shape. (In other words, its shape always changes.) Click here for the amoeba video clip. It moves using a pseudopod (false foot). It’s clear (you can see through it). The amoeba is a consumer. Click here for the amoeba video clip. The Paramecium The paramecium is an oval shaped protozoan. It moves using tiny hair-like appendages called cilia. Click here for the paramecium video clip. It is a pale, translucent color. It is a consumer. The Euglena The Euglena is an oval-shaped protozoan. It moves using a tail-like structure called a flagellum. The Euglena is green. It is primarily a producer, but can be a consumer. Click here for the video clip. Click here Monsters Inside Me: Eaten From The Inside Out. Protist Review Algae Algae can be microscopic to 150 feet long. Algae are producers. Algae are an important food source for sea life. Source: eFuse.com Algae provide over 50% of the oxygen we breathe. Benefits of Algae Used in … livestock feed. cosmetics. prescription drug production. identifying possible environmental problems. Benefits of Algae Food Production Sushi Ice cream Salad dressing Syrup (thickener) Fungi Fungi are consumers. (Must find and eat food.) Eats by absorbing food. Decomposer (feeds on and breaks down dead plant or animal matter). Can be from single-celled to largest organism alive. Can’t move. Examples. Mushrooms Truffles. A mushroom like fungus that grown underground; primarily found in Europe; a highly valued food. Examples. Lichen. Fungus often found as white or yellow patches on old walls, etc. Benefits of Fungi Used to make chemicals used in manufacturing. Produce antibiotics (example – penicillin). Clean the environment. Benefits of Fungi Food production. Cheese Mushrooms Yeast Truffles Soy sauce Click here HowStuffWorks: Bread Making. Harmful Effects of Fungi Causes 70% of all crop diseases. Diseases in humans. Respiratory (lung) diseases (example – pneumonia). Harmful Effects of Fungi Diseases in humans. Athlete’s foot. Ringworm (makes a raised round circle that looks like it was caused by a worm). When is Cheese Mold Good or Bad? The presentation ends here.