Westions 12 to 29, choose the best answer Demographic transition is the shift from
A. Low birth and death rates to high birth and death rates
B. High birth and death rates to moderate birth and death rates
C. High birth and death rates to low birth and death rates
D. Moderate birth and death rates to high birth and death rates
Population momentum is
A. The continued growth that occurs when there is increased fertility.
B. The continued growth that occurs in spite of declined fertility.
C. The continued growth that occurs whether there is increased or declined
D. None of the above.
Age structure of a population
A. Conceals socioeconomic trends.
Shows socioeconomic trends.
trends.

A and B

Explanation:

Are my best guesses

"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."