15. how does the poverty and political instability of mexico affect the united states? (1 point)
a. many mexicans come to the united states illegally.
b. many mexican villages are devoid of working-age males.
c. both a and b
d. none of the above

which elements do geologists measure to determine the age of an organism’s remains? check all that apply.

carbon-14

nitrogen

carbon-12

radiative zone

explanation    

radiative zone is the layer of the sun which energy is transferred away from the core by radiation. although, the core is the only part of the sun that produces an appreciable amount of heat through fusion. in fact, 99% of the energy produced by the sun takes place within 24% of the sun's radius.