12.5 The Evolutionary Process演化过程 Adaptive mutations are those that improve the fitness of an organism,increasing its survival capacity or reproductive success compared with that of competing organisms. Chen Feng,Shanghai Jiao Tong UniversityChen Feng, Shanghai Jiao Tong University 12.5 The Evolutionary Process演化过程 Adaptive mutations are those that improve the fitness of an organism, increasing its survival capacity or reproductive success compared with that of competing organisms