心皮是由大孢子叶两边愈合进化而来的.It has evolved by fusion of the two edges of the megasporophyll.孢子异型:指植物产生两种大小不同的孢子: 小孢子和大孢子.Heterospory The production of two different sizes of spore: microspores and megaspores.通常较大的大孢子含有更多的贮藏养料.The ...
The process itself is referred to as adventive embryogenesis.其过程本身称为不定胚胎发生.Charcoal prevents browning of tissues and stimulates embryogenesis and rooting.炭可防止组织变棕色并刺激胚胎发生与生根.Impressive metabolic alternations have been un...
蝌蚪变成蛙, 它的尾巴就逐渐被吸收掉.As a tadpole changes into a frog, its tail is gradually absorbed.蛙随着雨落开始哇哇叫.Frogs began to croak with the rainfall.蝌蚪是蛙的幼体.The tadpole is the larva of the frog....
No one is dare to get close to your dog as it is too feral.你的狗太凶猛了，所以没人敢靠近它。One minute more, and the feral roars of rage were again bursting from the crowd.再过一分钟, 群众中又爆发出一阵愤怒的吼声.After eating feral mango very how to after...