植物的祖先是进行光合作用的单细胞生物，由此产生的植物可能缺乏真正的根、茎、叶和复杂的生殖结构，如花朵。
The ancestors of plants were photosynthetic single-celled organisms that gave rise to plants presumably lacked true roots, stems, leaves, and complex reproductive structures such as flowers.
首先，德国小蠊在生殖结构上，它的每个卵荚含有的卵比其它物种要多得多。
First, the German cockroach has a larger number of eggs per capsule than the other species that infest structures.
雌性生殖结构：在某些同节植物中的雌性生殖组织，通常是一个圆形细胞或气囊，包含一个或多个卵球。
A female reproductive structure in certain thallophytes, usually a rounded cell or sac containing one or more oospheres.
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