One of the main differences between skin rashes and hives is the way that they appear on the skin. The raised, red bumps that are hives are eruptions on the surface of the skin. Rashes are a skin discoloration and will only appear slightly raised from the skinâs surface.
Alfred Russel Wallace, codeveloper of the theory of evolution. The image is modified from http://www.prs.k12.nj.us/schools/phs/science_Dept/APBio/Natural_Selection.html. In 1858, Charles Darwin received a letter from Wallace, in which Darwin's as-yet-unpublished theory of evolution and adaptation was precisely detailed.
Genetic Timeline. 1859. Discovery: Natural Selection. Charles Darwin wrote âOn the Origin of Species by Means of. Natural Selection, or the Preservation of Favored Races in the. Struggle for Life.â. 1865. Discovery: Heredity Transmitted in Units. Gregor Mendelâs experiments on peas demonstrate that. heredity is transmitted in discrete units. The understanding. that genes remain distinct entities even if the characteristics. of parents appear to blend in their children explains how. natural selection could work and provides support for.