He is an english biologist who proposed the theory of "Biological Evolution" by natural selection
Charles Darwin - defined evolution as "descent modification" the idea that species change overtime, give rise to a new species, and share a common ancestor.
Darwin
He proposed that the evolutionary history of life forms a branching tree with many levels in which species can be traced back to an ancient common ancestor.
Two Physical Features of organisms
Homologous Structures and Analogous Structures
Homologous - If two or more species share a unique physical feature, such as bone structures or a body plan, they may all have inherited this feature from a common ancestor.
Analogous Structures - are similar structures in organisms without shared ancestry. These structures evolved independently to serve the same purpose
Convergent evolution in analogous
The
organisms lived in similar environments and experienced similar selective pressures.
