2Note: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!!
3Recall Classification Organisms are classified by:cell typebody typehow they attain nutritiongenetic composition
4DomainsThere are three domains of Life:BacteriaArchaeaEukarya
11DiscussSummarize the characteristics of Eubacteria and check over your notes with a partner to make sure you got everything.
12Domain: Archaea Kingdom Archaebacteria prokaryotic unicellular asexual reproductionsometimes with conjugation
13Domain: Archaea Kingdom Archaebacteria strong cell wall with unique compositionautotrophicphotoautotrophchemoautotroph
14Domain: Archaea Kingdom Archaebacteria closer genetically to eukaryotes than eubacterialive in extreme environmentshigh heat, high salt
15DiscussSummarize the characteristics of Archaebacteria and check over your notes with a partner to make sure you got everything.
16Domain: Eukarya Kingdoms Protista, Fungi, Animalia, Plantae very diverse but all are eukaryoticunicellular or multicellularhighly organizedsexual or asexual reproduction
17Recall – 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?
18VirusesMultiple forms:helixicosahedralbacteriophageand more
19Viruses Nucleic Acid Bacteriophage anatomy [aka T-4 bacteriophage or just “phage”]head = capsidsheath aka tailNucleic Acid
20Viruses Reproduction must occur in a host cell two cycles: lytic cycle lysogenic cycle
21Viruses Lytic Cycle attachment infection incorporation of nucleic acid replication: viral DNA uses host to replicate DNA and make more virusesdestruction of cell
22Viruses Lysogenic Cycle attachment infection incorporation of nucleic acidDNA is dormant & replicates with cell info during cell cycle
23Viruses 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
24VirusesUses for virusesvaccinesgene therapyCystic Fibrosis
25Recall – 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?
26Homework Complete the worksheet on the backside of your lecture notes Draw, Label & Color Bacteria & Viruses