The following models show one large cell (a) and four small cells (b).
which of the following states why one of the models is better for moving more nutrients in and out of the cell?
a. b is better because it has more surface area.
b. a is better because it has less surface area.
c. a is better because it has more volume.
d. b is better because it has more volume.

B is better because it has more surface area.

Explanation:

the relative atomic mass of an element is the mass of one atom of that element, relative to 1/12th of the mass of a  1212c atom. to convert to an absolute mass in kg, it is necessary to multiply by  1.661×10−271.661×10−27.

the relative atomic mass is roughly equal to the number of neutrons, plus the number of protons, in the nucleus of the atom.

for elements with more than one stable isotope (different types of nucleus with different numbers of neutrons but the same number of protons), the quoted mass is usually the average mass, weighted by the relative abundance of the different isotopes.