Tag Archives: DNA

How Many Species Are There? Carolus Linnaeus, the Swedish biologist who founded modern taxonomy, described about 13,000 species in his 1758 opus Systema Naturae, but must have been well aware that this list was incomplete because in the eighteenth century much of the world remained unexplored by scientists. It is …

DNA is the carrier of genetic information in all cells and in many viruses. Yet a period of over 75 years passed from the time the laws of inheritance were discovered by Gregor Mendel until the biological role of DNA was elucidated. Even now, many details of how genetic information …