Vol. 226, No. 1, RECENT ADVANCES OF PLANT ROOT STRUCTURE AND FUNCTION PROCEEDINGS OF THE 5TH INTERNATIONAL SYMPOSIUM ON STRUCTURE AND FUNCTION OF ROOTS (2000), pp. 71-77 (7 pages) The effects of ...
There are four bases: Adenine and Guanine (purines); Cytosine and Thymine (Pyrimidines). Purines have two carbon-nitrogen rings while pyrimidines have a single carbon-nitrogen ring. Thus, there are ...
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