A.
Due to the star not being very massive, when it finally collapses in on itself, it will produce a neutron star, not a black hole.
Absolutely. If even a single cell cannot maintain homeostasts, how will it survive?
The statement that describes the difference between the 2 isotopes of nitrogen would be the last set.
Nitrogen-14 has 7 electrons, 7 protons, and 7 neutrons
Nitrogen-15 has 7 electrons, 7 protons, and 8 neutrons.