<span>An
atom with an atomic number of 12 has 12 protons. Because the mass
number is the sum of the protons and neutrons, the mass number would
need to be at least 12. I hope this helped!
</span>
Yes it does because how it looks
B) Primary producers. Autotrophs are organisms that produce their own food through photosynthesis, which are primary producers.
Echinoderms have radial symmetry.
