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记忆它们的是被子植物和裸子植物等胚种。 What recorded them were embryos of angiosperm and gymnosperm. | ||
大多数被子植物的胚珠有两层珠被，而裸子植物通常只有一层。 Most angiosperm ovules possess two integuments, while gymnosperms usually have only one. | ||
岩生植物按自然分类系统分为苔藓植物、蕨类植物、裸子植物、被子植物。 Rock plant, based on natural taxonomy system is classified into bryophyte, pteridophyte, gymnosperm, angiosperms; | ||
同时论文还将广东裸子植物种的分布区类型划分为20个亚型。 Meanwhile, the species areal-types of Guangdong Gymnospermae were divided into 20 subtypes in this paper. | ||
该虫寄主涉及到蕨类植物、裸子植物、双子叶植物、单子叶植物，共计109科389种(包括变种)。 The host plants of this insect include 389 species (varieties) in 109 families, and are composed of ferns plants, gymnospermae, dicotyledons and monocot crops. | ||
裸子植物的雌配子体简化，但较被子植物体的体积大，不能自养。 The female gametophyte is reduced but larger than in angiosperms; it is not autotroph ic. | ||
白垩纪中期之前，也就是说大约1亿年前，开花植物很少见：裸子植物占据着地球的景观。 Before the mid-Cretaceous, 100 million years ago or so, flowering plants were scarce: conifers and their relations ruled the landscape. | ||
提出了从裸子植物侧柏中分离纯化核糖体失活蛋白的制备和检测方法。 The preparation and detection methods of isolating and purifying a ribosome-inactivating protein (RIP) from the seeds of arborvitae were presented. | ||
而蕨类孢子和裸子植物花粉相比，可能对低熟-未熟油，特别是含非烃较高的低熟油有某种更为密切的联系。 Compared with gymnospermae pollen, the fern spore has a more closer relationship with soluble organism in the low-rank source rocks from the coal-bearing strata. | ||
根据对海南岛及周边岛屿的考察，记载可不同程度供饲用的植物1064种，其中属低等植物的海藻类6种，蕨类植物11种，裸子植物5种，被子植物1042种。 We observed and studied the forage resources to Hainan and its neighboring islets, recorded 1064 species forage plants, of which 6 seaweeds, 11 ferns, 5 gymnosperms and 1042 angiosperms. | ||
