1.B
2.A
3.B
4.A
5.B
6.B
7.A
Natural selection is what nature it self makes to enhance or mutate the species for survival of the finest but selective breeding is where humans mutate animals or plants to make them better, whether of use or taste, for our use.
The charge is 0. the 25 protons cancel out with the charge of the 25 electrons and the 30 neutrons are neutral. So the charge is neutral and 0.