html5
1 / 14

Classification

Eukaryote. Prokaryote. Archaebacteria & Bacteria. Classification. Old 5 Kingdom system Monera , Protists, Plants, Fungi, Animals _______________________ reflects a greater understanding of evolution & molecular evidence _________________________ _________________________

anneke
Télécharger la présentation

Classification

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. Eukaryote Prokaryote Archaebacteria&Bacteria Classification • Old 5 Kingdom system • Monera, Protists, Plants, Fungi, Animals • _______________________ • reflects a greater understanding of evolution & molecular evidence • _________________________ • _________________________ • _________________________ • _________________________ • _________________________ • _________________________ • _________________________

  2. Kingdom_______________ Kingdom _______________ Kingdom _______________ Kingdom _______________ Kingdom _______________ Kingdom _______________

  3. Domain Bacteria Domain Archaea Domain Eukarya Common ancestor Prokaryotes Domain Bacteria Domain Archaebacteria

  4. Bacteria live EVERYWHERE! • Bacteria live in all ecosystems • on plants & animals • in plants & animals • in the soil • in depths of the oceans • in extreme cold • in extreme hot • in extreme salt • on the living • on the dead Microbes alwaysfind a way tomake a living!

  5. Bacterial diversity rods and spheres and spirals… Oh My!

  6. eukaryote cell prokaryotecell Prokaryote Structure • Unicellular • bacilli, cocci, spirilli • Size • 1/10 size of eukaryote cell • 1 micron (1um) • Internal structure • no internal compartments • ________________________________ • ________________________________ • _____________________________ • not wrapped around proteins

  7. Prokaryote vs. Eukaryote Chromosome Prokaryote Eukaryote double helix

  8. mitochondria chloroplast Variations in Cell Interior cyanobacterium(photosythetic) bacterium aerobic bacterium internal membranesfor respirationlike a mitochondrion(cristae) internal membranesfor photosynthesislike a chloroplast(thylakoids)

  9. outer membrane of lipopolysaccharides Gram-negative bacteria Gram-positive bacteria peptide side chains outer membrane cell wall peptidoglycan cell wall peptidoglycan plasma membrane plasma membrane protein Prokaryote Cell Wall Structure That’simportant foryour doctorto know! peptidoglycan = polysaccharides + amino acid chains lipopolysaccharides = lipids + polysaccharides

  10. Prokaryotic metabolism • How do bacteria acquire their energy & nutrients? • photoautotrophs • photosynthetic bacteria • chemoautotrophs • oxidize inorganic compounds • nitrogen, sulfur, hydrogen… • heterotrophs • live on plant & animal matter • decomposers & pathogens

  11. Genetic variation in bacteria • Mutations • bacteria can reproduce every 20 minutes • binary fission • error rate in copying DNA • 1 in every 200 bacteria has a mutation • you have billions of E. coli in your gut! • lots of mutation potential! • Genetic recombination • bacteria swap genes • ____________________ • small supplemental circles of DNA • ____________________ • direct transfer of DNA conjugation

  12. Bacteria as pathogens • Disease-causing microbes • plant diseases • wilts, fruit rot, blights • animal diseases • tooth decay, ulcers • anthrax, botulism • plague, leprosy, “flesh-eating” disease • STDs: gonorrhea, chlamydia • typhoid, cholera • TB, pneumonia • lyme disease

  13. Bacteria as beneficial (& necessary) • Life on Earth is dependent on bacteria • _______________________ • recycling of nutrients from dead to living • _______________________ • only organisms that can fix N from atmosphere • needed for synthesis of proteins & nucleic acids • plant root nodules • help in digestion (E. coli) • digest cellulose for herbivores • cellulase enzyme • produce vitamins K & B12 for humans • produce foods & medicines • from yogurt to insulin

  14. Got any Questions?? Ask da’ Boss!

More Related