Friday, April 30, 2010
Fri-Day 2
Bio - we discussed the evolution of antibiotic resistant bacteria via the introduction of an antibiotic selecting agent. If a bacterial population, due to random mutations, has ONE or more bacterial cells that are ALREADY resistant to antibiotic "X", then these already adapted bacteria will survive and reproduce in this antibiotic X environment; the other non-resistant bacteria are much less likely to survive and reproduce. Thus, over time, this given bacterial population will have an increasing percentage of bacterial cells that are antibiotic X resistant- thus, this species of bacteria has evolved/changed.
AP Chem- we finished our Electrochemistry unit and moved on to our Nuclear Physics unit by discussing the various types of nuclear decay/ natural transmutation. In these equations, MASS NUMBER (total number of protons and neutrons) and ATOMIC NUMBER/CHARGE must be conserved.
We discussed the reasons for nuclear decay with respect to a certain stable ration of neutrons to protons in the nucleus.
AP Chem- we finished our Electrochemistry unit and moved on to our Nuclear Physics unit by discussing the various types of nuclear decay/ natural transmutation. In these equations, MASS NUMBER (total number of protons and neutrons) and ATOMIC NUMBER/CHARGE must be conserved.
We discussed the reasons for nuclear decay with respect to a certain stable ration of neutrons to protons in the nucleus.
# posted by C @ 11:26 PM 
