If the mass of an object is doubled, its gravitational force will

ANSWER:

If the mass of an object is doubled, the gravitational force will also double.

EXPLANATION:

This is because the 'gravitational force' acting on a body is "directly proportional" to the "mass of the body". According to Newton’s Law of Gravity, a gravitational force equal to the mass of the body acts on the body and it is this gravitation force that attracts the body.

Therefore, gravitational force being directly proportional increases or decreases as the mass of the object increases or decreases.

stratosphere: as the altitude increases, the air temperature increases. the stratosphere has a layer of ozone, called the ozone layer. this layer absorbs most of the ultraviolet radiation from sunlight. this results in the stratosphere being warmer.

"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."