What do inner planets have in common? a. they have a gas-surface composition.
b. they have many moons.
c. they have many rings.
d. they have a thin atmosphere.

d. they have a thin atmosphere.

Explanation:

tbh i think this is the best answer because inner planets DON'T have gas-surfaces, they DON'T have a lot of moons (earth only has one), and they DON'T have rings.

answer: c. two haploid cells

explanation:

"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."