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Presentation on theme: "THE FIVE KINGDOMS"— Presentation transcript:


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

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

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

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

7 Reproduction of Bacteria
Binary Fission- the process of one organism dividing into two organisms Fission is a type of asexual reproduction Asexual reproduction- reproduction of a living thing from only one parent How?... The one main (circular) chromosome makes a copy of itself Then it divides into two sv16.html

8 BINARY FISSION Bacteria dividing Completed Reproduction of Bacteria
Bacteria dividing Completed

9 Reproduction of Bacteria
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)

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

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

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

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 some bacteria cause diseases Animals can pass diseases to humans
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                                                                            1                                                                            1                                                                            1                                                                            1                                                                            1 Harmful Bacteria Human tooth with accumulation of bacterial plaque (smooth areas) and calcified tartar (rough areas)

16 Bacteria grow in the stomach of a cow to break down grass and hay
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
                                                                           1                                                                            1                                                                            1                                                                            1                                                                            1 Helpful Bacteria E.coli on small intestines

18 Helpful Bacteria 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

19 3 ways to control bacteria:
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 can’t grow when H2O is removed example: uncooked noodles & cold cereal

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                                                                            1                                                                            1                                                                            1                                                                            1                                                                            1 Pictures of Bacteria

22                                                                            1                                                                            1                                                                            1                                                                            1                                                                            1

23                                                                            1                                                                            1                                                                            1                                                                            1                                                                            1 Bacillus anthracis - rod, vegetative stage prokaryote (bacterium) Image Number: 21185A

24                                                                            1                                                                            1                                                                            1                                                                            1                                                                            1 Neisseria meningitidis - coccus prokaryote (bacterium) Image Number: 97214E

25 Leptospira interrogans - spiral shaped prokaryote (spirochete)
                                                                           1                                                                            1                                                                            1                                                                            1                                                                            1 Leptospira interrogans - spiral shaped prokaryote (spirochete)

26 Ecoli movement animatoin

27 http://www. google. ca/search. q=making+a+spore+print&hl=en&rls=com

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