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- Pollen ovule ratio 花粉胚珠比
- There is a high pollen count in the air. 空气中有很高的花粉计数。
- The ratios of 1 to 5 and 20 to 100 are the same. 1与5之比和20与100之比相同。
- Stamen is in the middle of a flower and may produce pollen. 雄蕊长在花的中央,能产生花粉。
- A microscopic fossil, as of a pollen grain or unicellular organism. 微体化石一种微小的化石,如花粉粒或单细胞有机体的化石
- The workers have little pollen baskets on their legs. 工蜂脚上有装花粉的小"篮子"。
- The ratio of students to teachers is 35:1. 学生和老师的比率是三十五比一。
- Anther is a part of a flower that contains the pollen. 花药是花的雄蕊上带花粉的部分。
- A minute opening in the ovule of a seed plant through which the pollen tube usually enters. 珠孔种子植物胚珠上的小开口,通常花粉管由此进入胚珠
- The ratio of schoolboys to schoolgirls is 2 to 1. 男学生和女学生的比例是2比1。
- Men outnumber women here in the ratio of three to one. 此地男子数量以三比一超过女子。
- The innermost wall of a spore or pollen grain. 内壁孢子或花粉粒最深处的壁
- The first or last term of a ratio or a series. 首项,末项比率或数列中第一个或最后一个项
- The ovule of Hyoscyamus niger is renuinullceate. 天仙子(Hyoscyamus niger)胚珠为薄珠心胚珠。
- Ovule primordia are formed in mid-March. 三月中旬,胚珠原体形成。
- Pollen sterile blossoms lack normal turgor. 花粉不育的花朵缺乏正常的膨压现象。
- The ovule was unitegmic and tenuinucellar. 薄珠心,单孢原,蓼型胚囊。
- Ovary 5-loculed, with 1 ovule per locule. 子房5室,具1胚珠每室。
- Ovary superior, 1-locular with 1 ovule. 子房上位,1室的具1胚珠。
- The pollen is shed directly on the stigma. 花粉直接散落在柱头上。