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.
Quotes of Robert Olby on exactly who may have discovered the structure of DNA. listen to Matt Ridley talking about Francis Crick. A celebration of Francis Crick's life in science. Francis Crick tells his life story at Web of Stories; Odile Crick's Artwork and biography; Bretscher M, Lawrence P (August 2004). Francis Crick 1916â2004. Current Biology.