1 / 8

Ch.18 Bacteria

Ch.18 Bacteria. Archaebacteria and Eubacteria. Archaebacteria- kingdom of first bacteria Are prokaryotic Have no membrane bound nucleus Have no organelles Three types: 1. live in oxygen free environment Produce methane gas Live in marshes, lakes and digestive tract of animals

petra
Download Presentation

Ch.18 Bacteria

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Ch.18 Bacteria

  2. Archaebacteria and Eubacteria • Archaebacteria- kingdom of first bacteria • Are prokaryotic • Have no membrane bound nucleus • Have no organelles • Three types: • 1. live in oxygen free environment • Produce methane gas • Live in marshes, lakes and digestive tract of animals • Play big role in sewage breakdown in sewage plants

  3. Archaebacteria continued • 2. live in water with high concentration of salt • Like in Utah’s Great Salt Lake and the Middle East’s dead sea • 3. live in acidic waters of sulfur springs. • Thrive near cracks deep in the Pacific Ocean floor • Are the producers for a unique underwater community

  4. Eubacteria • 2nd kingdom of prokaryotes • Includes bacteria that live in a more hospitable environment • Eubacteria live almost everywhere • Some are heterotrophs – eat things for nutrients • Others are autotrophs- make their own food by photosynthesis • Cyanobacteria • Contain chlorophyll to trap sunlight • Live in ponds and are in long chains • Eg. Anabaena

  5. A third type of eubacteria • Yet another type are those that are chemosynthetic • Use chemicals as energy source to make food instead of sunlight. • Import to farmers! Can turn atmospheric nitrogen into nitrogen usable to plants • Found on the roots of legumes (soy beans)

  6. Identifying bacteria • Gram staining • Procedure that classifies bacteria as either gram + or gram – • Gram + bacteria stain purple • Gram – bacteria stain pink • Each type responds differently to different antibiotics • Substance that kills bacteria (anti- against… biotic- life) • Doctors must know what type of bacteria you are infected with to prescribe an effective antibiotic

  7. Identifying bacteria • Shape is also used to identify bacteria • Three basic shapes: • Round (cocci) • Rod shaped (bacillus) • Spiral (spirillum) • Some have prefixes to describe their shape • Diplo- refers to paired arrangement • Staphylo- refers to an arrangement that resembles grapes • Strepto- refers to an arrangement of chains of cells

  8. Shapes of bacteria

More Related