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.
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