Explain how birth rate, immigration, death rate,
and emigration affect population growth.

What causes darkening of the skin as melanin production increases

How can a geological time scale best be reconstructed? a) comparing vestigial structures in living species b) comparing homologous structures in living species c) examining homologous structures in fossil remains d) examining the written records of scientists from past cultures

What type of graph presents information about how often certain or traits occur?