the science that deals with the dynamics and physical history of the earth, the rocks of which it is composed, and the physical, chemical, and biological changes that the earth has undergone or is undergoing.
the science of life or living matter in all its forms and phenomena, especially with reference to origin, growth, reproduction, structure, and behavior.
Biology. the science of heredity, dealing with resemblances and differences of related organisms resulting from the interaction of their genes and the environment.