In his work, Darwin argued that members of a species exhibited numerous small variations, and evolution 
(Darwin; argued; that members of a species exhibited numerous small variations, and evolution; L:In his work) Context(Darwin argued,List([13, 26))):(members of a species; exhibited; numerous small variations, and evolution)
Darwin argued,List([13, 26))
Darwin members of a species
argued exhibited
that members of a species exhibited numerous small variations, and evolution L:In his work
numerous small variations, and evolution