Biology, 07.04.2020 20:00 vanenav2003ovf1lz
Evidence suggests that factors which contribute towards the virulence of E. coli strain O157:H7, a bacterial strain reported to cause several food poisoning deaths, are caused by genes from a virus that infects bacteria. Considering this evidence, which statement most likely explains how the O157:H7 population acquired the genetic variation that distinguishes the strain from harmless E. coli strains, such as those that reside in our intestines?(A) Viral envelope proteins bind to receptors on the bacterial membrane, allowing the viral genetic material to enter the bacterium and become translated into proteins.(B) The virus infected the bacterium, and allowed the bacterial population to replicate with a copy of the phage genome in each new bacterium.(C) The virus entered the bacterial cell and incorporated its DNA into the bacterial genome, allowing the bacteria’s cellular machinery to create new viruses.(D) The virus entered the cell and acquired specific genes from the bacteria to increase the virulence of the virus.
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This map shows how climate change might affect precipitation patterns in the great plains of the united states by the end of this century. brown shoes a decrease in percipitation, and blue shows an increase. the maps differ based on the predictive levels of green house emissions. the maps shows that northern area should get a. more pracipations regardless of emmissions b. less pracipation, regardless of emmissions levels c. more precipitation, but only when emission levels.southern areas show a. more pracipations regardless of emmissions b. less pracipation, regardless of emmissions levels c. more precipitation, but only when emission levels.to use these maps to prepare for natural disasters in the great plains, scientist need to ask? a. how many tons of emissions were used at the basis of the map.b. which types of fossil fuels are used in the great plains c. if you think the above is wrong it's probly c the question is cut off
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Evidence suggests that factors which contribute towards the virulence of E. coli strain O157:H7, a b...
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