Biology 102Lecture 13Outline of Last Lecture:I. Clicker QuestionsII. PiliIII. EndosporesIV. Examples of BacteriaOutline of Current Lecture:I. Clicker QuestionsII. Prokaryotes III. CyanobacteriaClicker Questions:- If you want to trigger endospore formation in clostridium botulinum, how could you do it?A. Desiccation (drying out)B. Heating C. CoolingD. Lack of nutrients E. Low or high pH(all can apply except C, ex. freezing food it doesn’t kill the bacteria)- When temperatures are too cold, plants sense that and start producing seeds to survive and then when spring arrives seeds germinate and become flowers.- How do prokaryotes perform metabolic functions?- They have special membranesProkaryotes:Endospores: defense mechanism to help them to survive a harsh situation (not necessarily cold)Cyanobacteria:Cyanobacteria- blue green, carry out photosynthesis and they don’t have a cholorplastProkaryotic- circular chromosomes- no linear (eukaryotic), most of the time they also have smaller circles of DNA, called plasmids - DNA is kept in nucleus- region in cytoplasm where DNA is kept - Autotroph: self feeders; carry out photosynthesis- Heterotrophs: other feeders; organisms that carry out respirationBiology
View Full Document
Unlocking...