In reviewing evidence from a cold case, Investigator Chang realizes that the original investigators did not collect any DNA evidence. She's found a possible blood spot on some clothing in evidence that could yield some DNA of the perpetrator. She also knows that the investigators had a suspect in mind but could never prove her involvement. However, the suspect was embalmed and buried five years ago. Why will Investigator Chang be unable to collect DNA from the suspect? a. DNA is no longer available after 3 years
b. an embalmed body isn't suitable for DNA testing
c. a body that has been buried in dirt corrupts DNA material
d. DNA testing techniques can't extract DNA from dead bodies

"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."

c is the answer to this question. altitude affects the weather because air molecules evaporate.

you know they are heterozygous for a trait because they have it as jj or jj.