What evidence exists to support the theory of plate tectonics? Fixed points on the Earth’s surface move relative to one another.
Rock formations in deserts show evidence of erosion by glaciers.
Satellite images show a single landmass on earth 175 million years ago.
The lithosphere is the same age across the entire surface of Earth.

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.