Mollisols primarily occur in the middle latitudes and are extensive in prairie regions such as the Great Plains of the US. Globally, they occupy ~7.0% of the ice-free land area. In the US, they are the most extensive soil order, accounting for ~21.5% of the land area. Mollisols are among some of the most important and productive agricultural soils in the world and are extensively used for this purpose. Mollisols are divided into 8 suborders: Albolls, Aquolls, Rendolls, Gelolls, Cryolls, Xerolls, Ustolls, and Udolls. Click here for more information about these suborders.
Simple Answer: James Watson and Francis Crick are credited with the first correct double-helix model of DNA structure published in 1953 in the journal Nature.
The First Discovery of DNA. Few remember the man who discovered the molecule of life three-quarters of a century before Watson and Crick revealed its structure.Ralf Dahm.alf Dahm. Most everybody knows that DNA contains the blueprint for life. The names of Watson and Crick, the first scientists to figure out the structure of DNA in the 1950s, are also widely recognized. But left obscure in history is the name of the chemist who first isolated the DNA molecule itself.