IB DP Biology Themes

Common ancestry has given living organisms many shared features, while evolution has resulted in the rich biodiversity of life on Earth.

Adaptations are forms that correspond to function. These adaptations persist from generation to generation because they increase the chances of survival.

Systems are based on interactions, interdependence and integration of components. Systems result in emergence of new properties at each level of biological organization.

Living things have mechanisms for maintaining equilibrium and for bringing about transformation. Environmental change is a driver of evolution by natural selection.