Which statement best describes how materials move naturally? a. materials move from an area of high concentration to an area of lower concentration, or down the concentration gradient. b. materials move from an area of low concentration to an area of higher concentration, or up the concentration gradient. c. water is the only substance that can move down a concentration gradient. d. materials require energy to move up & a down their concentration gradients.

"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."

is this a question? wassup