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John S
John S

Viruses and bacteria are microscopic organisms. Viruses come in two types - active and hidden. Active viruses can make you sick immediately while hidden viruses can survive dormant for hundreds of years. Viruses are smaller than bacteria and contain protein coats and DNA. Antony van Leeuwenhoek first discovered bacteria in the 1600s using microscopes. Bacteria can reproduce through binary fission or conjugation and take different shapes like spiral, rodlike or spherical. They can be helpful in food production or harmful if not treated by processes like pasteurization.

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VirusesAndBacteriaA look at our microscopic world Chapter 2
PointsTo Remember
Viruses are classified as non-livingTwo types of viruses: active and hiddenHidden viruses can survive for hundreds of years before activating in a new-found hostActive viruses can make you sick right awayGenetic engineers can re-program viruses to deliver good DNA to help sick peopleViruses are much smaller than BacteriaTwo main parts of a virus: The Protein coat on the outside and the DNA on the inside.
Who was the first person to see and discover bacteria?Antony van Leeuwenhoek (1632-1723)Pronounced LAY vun hook
BacteriaOthers are Heterotrophic. They need others for food.Some are Autotrophic. That means they feed themselvesSome Bacteria produce by Binary Fission orAsexual ReproductionTo survive harsh conditions, Bacteria formEndosporesOther Bacteria produce by Conjugation orSexual Reproduction
BacteriaHave FlagellaOr a tail they useTo swim with
Names of VirusesSmallpoxVirusCold VirusInfluenzaVirusCold SoreVirusYellow FeverVirus
Bacteria in food can be killed with heat. This process is calledPasteurization.
Not all bacteriaare bad. Many are usedin foods like cheese,pickles, dried meat,soy sauce, breadand many others.
Three shapes of BacteriaSpiralRodlikeSpherical
Bacteria are naturalDecomposers.That is to saythey break down largechemicals into smallerchemicals in dead organisms.

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Final Presentation For Ci776 For 際際滷share

  • 1. VirusesAndBacteriaA look at our microscopic world Chapter 2
  • 3. Viruses are classified as non-livingTwo types of viruses: active and hiddenHidden viruses can survive for hundreds of years before activating in a new-found hostActive viruses can make you sick right awayGenetic engineers can re-program viruses to deliver good DNA to help sick peopleViruses are much smaller than BacteriaTwo main parts of a virus: The Protein coat on the outside and the DNA on the inside.
  • 4. Who was the first person to see and discover bacteria?Antony van Leeuwenhoek (1632-1723)Pronounced LAY vun hook
  • 5. BacteriaOthers are Heterotrophic. They need others for food.Some are Autotrophic. That means they feed themselvesSome Bacteria produce by Binary Fission orAsexual ReproductionTo survive harsh conditions, Bacteria formEndosporesOther Bacteria produce by Conjugation orSexual Reproduction
  • 6. BacteriaHave FlagellaOr a tail they useTo swim with
  • 7. Names of VirusesSmallpoxVirusCold VirusInfluenzaVirusCold SoreVirusYellow FeverVirus
  • 8. Bacteria in food can be killed with heat. This process is calledPasteurization.
  • 9. Not all bacteriaare bad. Many are usedin foods like cheese,pickles, dried meat,soy sauce, breadand many others.
  • 10. Three shapes of BacteriaSpiralRodlikeSpherical
  • 11. Bacteria are naturalDecomposers.That is to saythey break down largechemicals into smallerchemicals in dead organisms.