E. coli is a species of bacteria that causes many different infections in humans. Certain E. coli strains have developed resistance to antibiotics, making Infections with these strains difficult to treat. How do bacteria such as E. coli, which reproduce asexually, gain new
traits such as antibiotic resistance?
oject...
OA by undergoing spontaneous mutations when they replicate, which increases genetic variation in a population
B. by mutating their DNA in response to environmental conditions to gain beneficial traits
O c. by adapting to changes in environmental conditions without undergoing changes in their DNA
OD. by producing offspring with new gene assortments from genetic recombination, which increases diversity In a
population
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"1. it should be, it has been for about 20 years, and it's really not much different in the end than breeding animals to have particular traits. there are always concerns about genetically engineered animals/plants affecting the environment in unexpected negative ways, but i can't think of an example where the fears didn't turn out to be baseless.  

first, as you point out, it would be a great advance in pharmacology, to be able to tailor drugs and their doses to me. the pros involve better medical treatment. the cons involve privacy issues like insurance companies denying coverage to people with genetic risk factors. looking at dna markers wouldn't affect the frequency of genetic diseases, but it would allow detection of them earlier. and ok, actually i suppose that if people used this information to avoid having children with genetic diseases, some might decrease in frequency."

the "power" of a lens is its resolution power, or its ability to distinguish between to closely located points. with the low power lens, it is likely you will see the rough form of the hay and maybe some movement of dots around the hay. however, when observed with the high power lens, the detailed features of the hay become visible and the microbes being grown are more clearly visible.

i hope this you