被子植物的的英文

angiospermous

• 的:    4次方是 The fourth po ...
• 被子植物的起源和分类:    the origin and cla ...
• 被子植物:    angio erm; angiosp ...

例句与用法

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1. Ribosomal rna genes ( rdna ) , a group of tandem repetitive sequence , are well - studied in angiosperms
   被子植物的rrna基因已经得到深入研究。
2. Most angiosperm ovules possess two integuments , while gymnosperms usually have only one
   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。
3. Unlike the companion cells of angiosperms , they are not derived from the same mother cell as the sieve cell
   但与被子植物的伴胞不同，它们不和筛胞起源于一个共同的母细胞。
4. Gymnosperms lack endosperm and the precise double fertilization characteristic of the angiosperms , although some show a primitive form of it
   尽管裸子植物还保留有某些被子植物的基本形态，但它没有被子植物所特有的胚乳以及双受精现象。
5. They differ from conifers and other gymnosperms by having the ovule enclosed within an ovary , which after fertilization develops into a fruit
   被子植物不同于针叶植物和其他的裸子植物，被子植物的胚珠由子房所包被，受精后直接发育为果实。