ï Outline of presentation :
            For outline of presentation and for the legends of figures, see  the Handbook for the course "Biology 121 Notes,
Spring, 1998, University of Illinois, Plant Biology: Ecology and Organismic Plant Biology" by Govindjee, Stipes  Publishing,
Champaign,IL.
 
    © Slides used in the class are to be found elsewhere on these Web pages.