asexuality相关论文
Many aphid species exhibit a variation in reproductive mode which is influenced by winter climate regimes,with cyclical ......
对北美红杉不同个体间插穗生根能力的试验研究表明:北美红杉不同个体间插穗生根能力存在着很大的变异性,其中生根率的变异范围在16%-1......