Meaning of Evolution and Current Concepts
Evolution is the development of organisms from pre-existing simple organisms over a long period of time.
It is based on the similarities in structure and function that is observed in all organisms.
All are made up of cells, and similar chemical compounds are present.
This indicates that all organisms may have had a common origin.
Evolution seeks to explain the diversity of life and also to answer the question as to the origin of life, as well as its present state.