The diagram documents a famous experiment by Diane Dodd. Dodd took an initial population of Drosophila fruit flies and separated them into two different containers. The first group was fed food containing mostly starch. The second group was fed food containing mostly maltose. After eight generations apart (about four months), the flies were re-introduced and could not longer interbreed. They had become two new species.

Which of the following statements is most likely correct about a rock belonging to the jurassic age and a rock belonging to the cambrian age? options: 1) they have identical fossils of organisms that have evolved over time. 2) both have animal fossils preserved in them due to weathering and erosion. 3) they contain different fossils because life on earth has changed through time. 4) the fossils in them were formed on the surface of earth due to exposure to sunlight.