WILL GIVE BRAINLIEST! 1)How does contaminated runoff affect the delicate balance of ocean life? A: Nitrogen and oxygen are in balance in ocean water. If more nitrogen is added, oxygen is forced out. B: Schools of fish will not travel through areas of polluted water, forcing them to stay in one place, overfeeding on one source of food. C: The food supply for phytoplankton is greatly increased, and they multiply so fast that their predators cannot control their population. Poisons in the runoff kill many of the marine organisms that prey on phytoplankton, which allows them to increase their population greatly, causing an algal bloom.

"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."