While visiting the Galapagos Islands in 1835, Charles Darwin collected over thirteen different species of a type of bird called a finch. He later observed that the birds were similar in many ways but often differed in the size and shape of their beaks. Which statement BEST summarizes Darwin's explanation for the different beaks he observed in these finch species?A) The beaks changed so they could eat different foods. B) The beaks of each finch species were the result of natural selection. C) The size and shape of the beaks differed because of the effects of artificial selection. D) The size and shape of the beaks differed because of different climates found on the islands.

B: The beaks of each finch species were the result of natural selection.

Explanation:

climate change and pollution

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.