9.地球上现存的各种生物是由共同祖先经过漫长的时间逐渐演变而来的各种生物之间有着或远或�的亲缘关系其生殖和�育的原理有共性而且都存在遗传 Template




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tomski9.地球上现存的各种生物是由共同祖先经过漫长的时间逐渐演变而来的各种生物之间有着或远或�的亲缘关系其生殖和�育的原理有共性而且都存在遗传 coloring