The development of life beyond planet Earth is a long-standing quest of the human race,but whether normal mammalian embr......

利用卫星搭载向日葵种子后获得的花部变异株，SP2正常株与对照株比较，结果表明：突变株筒状花的花瓣变大、增长，花药变小，而子房和花柱的......