求助求助！！！实在是不知道这个词的意思~

sally9031

Nearly a century ago, biologists found that if they separated an invertebrate animal embryo into two parts at an early stage of its life, it would survive and develop as two normal embryos. This led them to believe that the cells in the early embryo are undetermined in the sense that each cell has the potential to develop in a variety of different ways. Later biologists found that the situation was not so simple. It matters in which plane the embryo is cut. If it is cut in a plane different from the one used by the early investigators, it will not form two whole embryos.


这个plane在这里究竟是什么意思？实在想不通~但是后面有题目需要弄懂~

sally9031

豁然开朗！！！谢谢你~

临窗听雨

一个世纪以前，生物学家发现，如果在无脊椎动物胚胎早期将胚胎分为两部分，胚胎不仅会活下来，并且会发展成两个正常的胚胎。这发现使他们相信，早期胚胎里的细胞并没有被确定，也就是说每个细胞都进行不同生长的潜力。之后，生物学家发现，情况并不是这样简单的。胚胎的切割平面很关键。如果胚胎的切割平面与之前研究者使用的平面不一样的话，胚胎就不会发展成两个完整的胚胎。

sally9031

谢谢你哈~我是文科生~这生物题对我来说真挑战~那意思是这个胚胎是可以切的么？~切成两半各自又完整了？~

yc2013

面，刨面，平面

sally9031

有人有一点想法么？~~~小安阅读里的一篇文章~这是第一段~