2 Note:Read and LISTEN!!I mentioned this at the beginning of the year and semester , but as the year progresses, you’ll have less and less notes given on the screen…in this unit, you’ll have both information on the screen itself, AND info that you’ll need to listen for [not everything will be on the board]so Read and LISTEN!!
3 Recall Classification Organisms are classified by:cell typebody typehow they attain nutritiongenetic composition
4 DomainsThere are three domains of Life:BacteriaArchaeaEukarya
14 Domain: Archaea Kingdom Archaebacteria closer genetically to eukaryotes than eubacterialive in extreme environmentshigh heat, high salt
15 DiscussSummarize the characteristics of Archaebacteria and check over your notes with a partner to make sure you got everything.
16 Domain: Eukarya Kingdoms Protista, Fungi, Animalia, Plantae very diverse but all are eukaryoticunicellular or multicellularhighly organizedsexual or asexual reproduction
17 Recall – Characteristics of Life It is debatable if viruses are truly alive or not.Discuss with a partner whether or not you think a virus fulfills the characteristics which all living things must have.organized (into cells)reproducescan pass traits to offspringgrows/developsneeds energymaintains homeostasisresponds to stimuli?
18 VirusesMultiple forms:helixicosahedralbacteriophageand more
19 Viruses Nucleic Acid Bacteriophage anatomy [aka T-4 bacteriophage or just “phage”]head = capsidsheath aka tailNucleic Acid
20 Viruses Reproduction must occur in a host cell two cycles: lytic cycle lysogenic cycle
21 Viruses Lytic Cycle attachment infection incorporation of nucleic acid replication: viral DNA uses host to replicate DNA and make more virusesdestruction of cell
22 Viruses Lysogenic Cycle attachment infection incorporation of nucleic acidDNA is dormant & replicates with cell info during cell cycle
23 Viruses Prion – “evil misshapen protein” / viral protein responsible for mad cow disease which destroys brain tissuerecent discoveries, however, show that “normal” prions may have an important role in keeping nerve cells healthy
24 VirusesUses for virusesvaccinesgene therapyCystic Fibrosis
25 Recall – Characteristics of Life So…are viruses alive? Why or Why Not? Which characteristics does it share with living things?organized (into cells)reproducescan pass traits to offspringgrows/developsneeds energymaintains homeostasisresponds to stimuli?
26 Homework Complete the worksheet on the backside of your lecture notes Draw, Label & Color Bacteria & Viruses