胚珠是半球形的，有2个被膜，腱鞘状，而原孢子细胞直接作为大孢子母细胞起作用。
The ovules are hemitropous, with 2 integuments, tenuinucellate and the archesporial cell functions directly as the mega-spore mother cell.
他们从人造“原细胞”着手，这些像真细胞的“人造细胞”外部被一层脂肪膜所包围。
They began by experimenting on artificial "protocells". These, like real cells, were surrounded by membranes made of fatty molecules.
路易吉·路易西认为先有膜：膜能将最初的原细胞包起来，并使其重要化学成分集中起来。
Luigi Luisi favored the membrane first: it would hold a primitive "protocell" together and keep its vital chemicals concentrated.
这些类似真细胞的“原细胞”被油脂分子包围。膜上浮动的的蛋白只会让某些离子通过。利用这个系统，研究人员发现他们可以将电鳗的发电机能复制出来。
These, like real cells, were surrounded by membranes made of fatty molecules. Proteins "floating" in the membranes would let only certain ions pass.
原核生物与真核生物之间最大也是最主要的区别就在于真核细胞在特殊的代谢活动发生的地方包含了拥有膜包围的间隔间。
The major and extremely significant difference between prokaryotes and eukaryotes is that eukaryotic cells contain membrane-bound compartments in which specific metabolic activities take place.
原核生物与真核生物之间最大也是最主要的区别就在于真核细胞在特殊的代谢活动发生的地方包含了拥有膜包围的间隔间。
The major and extremely significant difference between prokaryotes and eukaryotes is that eukaryotic cells contain membrane-bound compartments in which specific metabolic activities take place.
应用推荐