Georges cuvier and his fellow catastrophists believed that?
a. catastrophes could not explain the changes in species seen through the fossil strata.
b. when species became extinct to a local catastrophe, organisms from surrounding areas moved in to repopulate the area.
c. species were not fixed and that they adapted in response to catastrophes that occur.
d. species were fixed although they did change through time in response to catastrophes that occur

d

explanation:

i went with the logic of the theory of natural selection

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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.