Indicate and discuss factors that might account for this unequal distribution. A are abundant in the northern lake where turtles of species B are rare. A are rare. Hereditary variations are essential to the evolution of populations. Explain how this variability can lead to the origin and maintenance of species.
Most mammals live on land.
Describe and discuss the evolutionary adaptations that make mammals better adapted to life on land than amphibians. Describe how the two populations may become different, including factors that can account for these differences. Discuss factors that may prevent interbreeding if the two populations ever again occupy the same area. Charles Darwin's theory of natural selection had a significant influence on the under- standing of the evolution of organism. Discuss the significance of each of the events listed below in the evolution of living things.