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From Bacteria to Plants Pages 8-13.  Anton von Leeuwenhoek discovered bacteria when he observed scrapings of his teeth.

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Presentation on theme: "From Bacteria to Plants Pages 8-13.  Anton von Leeuwenhoek discovered bacteria when he observed scrapings of his teeth."— Presentation transcript:

1 From Bacteria to Plants Pages 8-13

2  Anton von Leeuwenhoek discovered bacteria when he observed scrapings of his teeth.

3  Bacteria come in 3 basic shapes  Cocci which looks like sphere  Spirillum which looks like spiral  Bacillus which looks like a rod  They are considered to be living because they are made up of cells.

4  Here is a typical bacterial cell  Ribosomes make proteins  Flagellum = movement  Capsule = prevents drying  Chromosome = genetic material

5 Bacteria are prokaryotes, which means they lack a nucleus. Bacteria are prokaryotes, which means they lack a nucleus. Some bacteria have features such as a capsule, slime layer or flagella to help them survive in unfavorable environments.Some bacteria have features such as a capsule, slime layer or flagella to help them survive in unfavorable environments.

6  Asexual Reproduction (Binary Fission) Involves 1 parent Offspring are identical to the parent Often do this through fission: a process in which one cell divides to form two identical cells

7  Sexual Reproduction (Conjugation)  Involves 2 parents, combination of both parents’ genetic material  Creates a New Organism ▪ Results in bacteria with new combination of genetic material ▪ Doesn’t increase the number of bacteria ▪ Increase kinds of bacteria

8  Can either be autotrophs or heterotrophs  Most are consumers  Breakdown food in a process called respiration

9  Eubacteria  Live almost everywhere  Most are useful or harmless  Some cause disease (tetanus & strep throat)  Help maintain some of Earth’s conditions  Archaebacteria  Found in extreme conditions  Bacteria BrainPop Bacteria BrainPop

10  Some ways bacteria are good for us  Make antibiotics  Produce vitamins  Aid in digestion of food  Recycle materials  Used for fuel  In foods  Clean up waste (pollutants)  Make cleansers

11  Some ways bacteria are bad for us  Pathogens = cause disease  Produce toxins = poisons  Infectious Disease: Disease caused by virus, bacteria, protist, or fungi AND spreads.

12  Vaccines can be effective against preventing bacterial diseases.  Bacterial diseases CAN be treated with antibiotics.  Pasteurization = heating a liquid to kill the bacteria.


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