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What is a microorganism? Micro – very small; organism – living thing. A very small, living thing.

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Presentation on theme: "What is a microorganism? Micro – very small; organism – living thing. A very small, living thing."— Presentation transcript:



3 What is a microorganism? Micro – very small; organism – living thing. A very small, living thing.

4 Let’s look at examples of microorganisms.

5 Bacteria

6 Bacteria are single-celled organisms (made of one cell). They are found everywhere.

7 Bacteria come in three shapes.  Round (coccus)  Rod (bacillus)  Spiral (spirillum)

8 Some are producers. (Producer – makes own food)

9 Other bacteria are consumers. (Consumer - Has to find food and eat it.)

10 Beneficial uses of bacteria.  Provide nitrogen for plants. Fixes the soil (changes the nitrogen to a form the plant can use).  Get minerals from ores.

11 Beneficial uses of bacteria.  Used to make plastics and laundry detergents.  Help make antibiotics.

12 Beneficial uses of bacteria.  Yogurt  Sauerkraut  Pickles  Olives

13 Beneficial uses of bacteria.  Chocolate  Cheese  Soy Sauce  Vinegar  Ketchup

14 Why Swiss Cheese Has HolesHoles.

15 Harmful effects of bacteria.  Cause Diseases (<1% of bacteria cause diseases)  Three ways to get disease. Through air (breathe in). Through touch. Eating contaminated food.

16 Harmful effects of bacteria.  Examples of bacterial diseases. Dental caries (cavities). Strep throat. Salmonella. Typhoid fever.

17 Harmful effects of bacteria.  Causes disease in farm animals.  Causes metal to rust and wear away. Click here for Bacteria Eating the TitanicTitanic.

18 Can Bacteria Get SickSick?

19 How to prevent diseases.  Vaccinations.  Antibiotics.  Wash hands after using bathroom or whenever dirty.

20 How to prevent diseases.  Cook food properly.  Store food properly.  Cover mouth when sneezing, coughing.

21 Click here for GermsGerms. Click here for How Dirty are BathroomsBathrooms? Click here for the Proper way to Use TPTP.

22 Click here for the Surprise ToothbrushToothbrush.

23 Click here for the Five-Second RuleRule. http://videos.howstuffwork florida/4112-nuke-your- sponge-video.htm

24 Click here for How Bacteria Become Drug ResistantClick here for How Bacteria Become Drug Resistant.

25 When you see a pond, you see a lot of life! Photo source: Hobo’s Pond B&B

26 Much of it, you can’t see!

27 It’s too small for you to see. To see it, you will need a microscope.

28 This is the world of the protozoan (protist). Photo source: University of Winnipeg, Dr. Simmons’ protist webpage

29 Note: All protists live in water. Photo source: University of Winnipeg, Dr. Simmons’ protist webpage

30 Let’s examine three different examples of protozoans.

31 The Amoeba

32 The amoeba is among the most primitive of all organisms.

33 The amoeba has an irregular shape. (In other words, its shape always changes.)

34 It moves using a pseudopod (false foot). It’s clear (you can see through it). The amoeba is a consumer.

35 The Amoeba Staples High School, West Port, CT, Mr. Lazaroff’s webpage

36 The Paramecium

37 The paramecium is an oval shaped protozoan. It moves using tiny hair-like appendages called cilia.

38 It is a pale, translucent color. It is a consumer.

39 Biology Teaching & Learning Resources - Biological Drawings: Protista. Paramecium The Paramecium

40 The Euglena

41 The Euglena is an oval-shaped protozoan. It moves using a tail-like structure called a flagellum.

42 The Euglena is green. It is primarily a producer, but can be a consumer.

43 The Euglena

44 Click here Monsters Inside Me: Eaten From The Inside OutClick here Monsters Inside Me: Eaten From The Inside Out.

45 Algae

46 Algae can be microscopic to 150 feet long. Source: Scribemedia.orgc

47 Algae are producers. Source:

48 Algae are an important food source for sea life. Source:

49 Algae provide over 50% of the oxygen we breathe.

50 Benefits of Algae  Used in … livestock feed. cosmetics. prescription drug production. identifying possible environmental problems

51 Benefits of Algae  Food Production Sushi Ice cream Salad dressing Syrup (thickener)

52 Fungi

53  Consumer. 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.

54  Examples. Mushrooms. Truffles.  A mushroom like fungus that grown underground; primarily found in Europe; a highly valued food. Lichen  Fungus often found as white or yellow patches on old walls, etc.

55 Benefits of Fungi  Used to make chemicals used in manufacturing.  Produce antibiotics (example – penicillin).  Clean the environment.

56 Benefits of Fungi  Food production. Cheese Mushrooms Yeast Truffles Soy sauce

57 Click here HowStuffWorks Show: Bread MakingClick here HowStuffWorks Show: Bread Making.

58 Harmful Effects of Fungi  Causes 70% of all crop diseases.  Diseases in humans. Respiratory (lung) diseases (example – pneumonia). Athlete’s foot. Ringworm (makes a raised round circle that looks like it was caused by a worm).

59 When is Cheese Mold Good or Bad?

60 The presentation ends here.

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