been used to generate food crops that are genetically modified. Dr. Lin Yan and Dr. Philip S. Kerr, the
diversity as 'the variety and variability of living organisms and the biological communities in which they live'
Teacher you will find these time-saving instructor aids: • About the Work: pertinent background information
E SSAYS ON TWENTIETH-C ENTURY H ISTORY In the series Critical Perspectives on the Past, edited