Smith and cuvier discovered that similar groups of fossils in distant rock layers could be correlated. why was this such a major breakthrough in geology? a it disproved the principle of superposition. b it proved igneous rocks held more information than sedimentary rocks. c fossils could now be used to identify rock layers. d fossils were no longer needed to study the history of earth.

The diagram shows the results when two parents are crossed. the letters represent alleles for a trait that is controlled by three different genes. which best describes this inheritance pattern? multiple allele because a trait is controlled by three different genes polygenic because the offspring have alleles from both parents multiple allele because the offspring have alleles from both parents polygenic because a trait is controlled by three different genes