Female sea turtles return to land after they are mature in order to lay their eggs. why would female turtles spend more time on land than males?

it would be most likely A.

since female sea turtles usually tend to use up mid may to almost august they usually visit more than once since they lay 150+ eggs.

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.

there are so many examples for that in different areas, like biology experiment carried out in our lab recently.

here's one link: