Ten-year-old all has a ring-shaped fungal skin infection on his leg. his doctor asks his mother whether anyone else in the house has a similar infection. his mother
tells the doctor no one else has the infection, but their dog has a circular, itchy bald spot and that ali plays with the dog a lot. the doctor informs ali and his mother
that he caught the infection from their dog. which mode of disease transmission most likely spread the infection from the dog to ali?
a. contaminated food
b. direct contact
c. mosquito
d. aerosol of the dog's body fluid

I believe it is B, direct contact

Explanation:

Ali most likely wasn't eating food that the dog had contaminated, nor was it likely that a mosquito first bit the dog and then Ali. This leaves A and D, and A seems to be more likely.

Apologies if I am incorrect.

"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."

during the process of dna replication, brdu can replace thymidine and incorporate into the newly synthesized dna, cell proliferation thus can be reflected in the extent of brdu incorporation.