12
what type of speciation occurs when a plant population becomes reproductively isolated while living with its parent population?
sympatric
subspecies
subpopulation
allopatric

the atomic number of magnesium is 12. its nucleus must contain 12 protons and no electrons. the atomic number of an atom is determined by the number of protons.

magnesium is an electrolyte injection commonly used to treat low magnesium levels in your blood. it is also used to prevent or control seizures in women with preeclampsia or eclampsia.

answer; cnidarians;