Which is the first step in the process during the formation of molded fossils? Sediment hardens into rock.
O Sediment is eroded from rock.
O Organisms are buried under sediment.
O Organisms' shapes are preserved in rock.

Gene flow and genetic drift both affect allele frequencies in a population. a high level of gene flow into a population genetic diversity in a population. a high level of gene flow out of a population genetic diversity in a population. genetic drift is the change in allele frequencies due to factors. typically, genetic drift has the biggest impact on populations.