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 In 1858, Charles Darwin received a letter from Wallace, in which Darwin's as-yet-unpublished theory of evolution and adaptation was precisely detailed.
Natural selection is a principle that was first proposed by Charles Darwin and Alfred Russel Wallace. The two biologists noted that organisms which were better adapted to their environment tended to survive longer. Better adapted organisms also tend to reproduce more than less well-adapted organisms.atural selection is a principle that was first proposed by Charles Darwin and Alfred Russel Wallace. The two biologists noted that organisms which were better adapted to their environment tended to survive longer. Better adapted organisms also tend to reproduce more than less well-adapted organisms.