Presentation is loading. Please wait.

Presentation is loading. Please wait.

1 THE FIVE KINGDOMS. 2 Introduction to Bacteria 2 TYPES OF BACTERIA: Bacteria -Get food from an outside source Blue-green Bacteria -Make their own food.

Similar presentations


Presentation on theme: "1 THE FIVE KINGDOMS. 2 Introduction to Bacteria 2 TYPES OF BACTERIA: Bacteria -Get food from an outside source Blue-green Bacteria -Make their own food."— Presentation transcript:

1 1 THE FIVE KINGDOMS

2 2 Introduction to Bacteria 2 TYPES OF BACTERIA: Bacteria -Get food from an outside source Blue-green Bacteria -Make their own food

3 3 BACTERIA Bacteria - small one celled monerans Bacteria like a warm, dark, and moist environment They are found almost everywhere: -water-air -soil-food -skin-inside the body -on most objects

4 4 Spiral: spirilla rod-shaped: bacilli, bacillus Round: cocci 3 Shapes of Bacteria Bacteria are classified by shape into 3 groups:

5 5 3 Shapes of Bacteria Bacillus anthracis – (bacillus) Neisseria meningitidis (coccus) Leptospira interrogans – (spirilla)

6 6 7 Major Structures of a Bacteria Cell Capsule Cell wall Ribosomes Nucleoid Flagella Pilli Cytoplasm

7 7 Binary Fission- the process of one organism dividing into two organisms Fission is a type of asexual reproduction Reproduction of Bacteria How?... The one main (circular) chromosome makes a copy of itself Then it divides into two Asexual reproduction- reproduction of a living thing from only one parent

8 8 BINARY FISSION Bacteria dividing Completed Reproduction of Bacteria

9 9 The time of reproduction depends on how desirable the conditions are Bacteria can rapidly reproduce themselves in warm, dark, and moist conditions Some can reproduce every 20 minutes (one bacteria could be an ancestor to one million bacteria in six hours) Reproduction of Bacteria

10 10 Bacterial Cell & Nucleiod DNA Ring DNA replication Cell wall synthesis Cell separation

11 11 Bacteria Survival Endospore- a thick celled structure that forms inside the cell they are the major cause of food poisoning they can withstand boiling, freezing, and extremely dry conditions it encloses all the nuclear materials and some cytoplasm allows the bacteria to survive for many years

12 12 Bacillus subtilis Endospore-the black section in the middle highly resistant structures can withstand radiation, UV light, and boiling at 120oC for 15 minutes. Bacteria Survival

13 13 Bacteria Survival – Food sources parasites – bacteria that feed on living things saprophytes – use dead materials for food (exclusively) decomposers – get food from breaking down dead matter into simple chemicals important- because they send minerals and other materials back into the soil so other organisms can use them

14 14 Harmful Bacteria some bacteria cause diseases Animals can pass diseases to humans Communicable Disease – Disease passed from one organism to another This can happen in several ways: Air Touching clothing, food, silverware, or toothbrush Drinking water that contains bacteria

15 Human tooth with accumulation of bacterial plaque (smooth areas) and calcified tartar (rough areas) Harmful Bacteria

16 16 Helpful Bacteria Decomposers help recycle nutrients into the soil for other organisms to grow Bacteria grow in the stomach of a cow to break down grass and hay Most are used to make antibiotics Some bacteria help make insulin Used to make industrial chemicals

17 E.coli on small intestines Helpful Bacteria

18 18 Used to treat sewage Organic waste is consumed by the bacteria, used as nutrients by the bacteria, and is no longer present to produce odors, sludge, pollution, or unsightly mess. foods like yogurt, cottage & Swiss cheese, sour cream, buttermilk are made from bacteria that grows in milk Helpful Bacteria

19 19 Controlling Bacteria 3 ways to control bacteria: 1) Canning- the process of sealing food in airtight cans or jars after killing bacteria endospores are killed during this process 2) Pasteurization- process of heating milk to kill harmful bacteria 3) Dehydration- removing water from food Bacteria cant grow when H 2 O is removed example: uncooked noodles & cold cereal

20 20 Controlling Bacteria Antiseptic vs. Disinfectants Antiseptic- chemicals that kill bacteria on living things means – against infection Examples: iodine, hydrogen peroxide, alcohol, soap, mouthwash Disinfectants- stronger chemicals that destroy bacteria on objects or nonliving things

21

22

23 Bacillus anthracis - rod, vegetative stage prokaryote (bacterium) Image Number: 21185A

24 Neisseria meningitidis - coccus prokaryote (bacterium) Image Number: 97214E

25 Leptospira interrogans - spiral shaped prokaryote (spirochete)

26 26 Ecoli movement animatoin ges/jjani_qt/ecoli_qt.html

27 27 search?q=making+a+sp ore+print&hl=en&rls=c om.microsoft:en- ca:IE- SearchBox&prmd=v&so urce=univ&tbs=vid:1&t bo=u&ei=lZDdTP7qMM ienAe_3pXtDw&sa=X& oi=video_result_group &ct=title&resnum=2&v ed=0CCcQqwQwAQ


Download ppt "1 THE FIVE KINGDOMS. 2 Introduction to Bacteria 2 TYPES OF BACTERIA: Bacteria -Get food from an outside source Blue-green Bacteria -Make their own food."

Similar presentations


Ads by Google