| 1. | All trees except palms are dicotyledons .
除了棕榈树，所有的树都是双子叶植物。
|
| 2. | The dicotyledons diverged at an early stage of their evolution into two main groups .
双子叶植物在演化的早期阶段就已分化为两大支派。
|
| 3. | Dicotyledons usually show a netlike arrangement whereas monocotyledons generally show a parallel distribution of vein
双子叶植物主要为网状脉，而单子叶植物主要为平行脉。
|
| 4. | Astrosclereid an irregularly branched sclereid found in the messophyll of leaves of certain dicotyledons
星状石细胞：在一些双子叶植物的叶肉细胞中发现的一种不规则的分枝状的石细胞。
|
| 5. | A clearly defined endodermis is seen in all roots and in the stems of the non seed - bearing vascular plants and some dicotyledons
所有不产生种子的维管植物和一些双子叶植物的茎中都可以清楚的显示出这一结构。
|
| 6. | Some 60 of monocotyledons and 40 of dicotyledons are polyploid , as are 90 of ferns , many bryophytes , and some algae
60的单子叶植物和40的双子叶植物、 90的蕨类植物、多数苔藓植物以及某些藻类，都是多倍体。
|
| 7. | Angiosperms are divided into two major classes , the monocotyledons ( monocotyledonae ) and dicotyledons ( dicotyledonae ) , with a small basal group known as primitive dicotyledons
被子植物可以划分为两个纲，单子叶植物纲和双子叶植物纲。
|
| 8. | Monocotyledons and dicotyledons are so termed because they normally conatin one and two cotyledons respectively although there are exceptions
尽管有例外的情况出现，我们通常还是根据子叶的数目为一片还是两片而把植物分成单子叶植物和双子叶植物。
|
| 9. | ( 4 ) the tubiform petal of p . suffruticosa andr . and paeonia lactiflora pall , is a special petal which only has been occurred in the highflower of pralification flower of the above two species . the petal is similar to corolla of some family of sympetalous dicotyledon in shape , however it has a more thin base and many different lobes in form and size
（ 4 ）在对台阁花型的研究中新发现了一种特殊的花瓣一筒状花瓣，它具有筒状结构，外形类似于一些合瓣花类植物的花冠，但筒的基部更细，向上变粗，口部边缘变化较大，具形状和大小各异的裂片，有的呈喇叭形，有的呈钟形，筒内壁上有时具一顶部游离的芒状物。
|
| 10. | These results show that coda gene cloned from e . coli can express specifically in the anther of both monocotyledon and dicotyledon plant species upon induction of 5 - fc , and the in vivo expression product of the gene can transform the 5 - fc used externally into 5 - fu , which leads to all or partial inactivity of anthers and / or pollens
以上结果表明， coda基因在单子叶植物和双子叶植物花药中的特异性表达，能将外用的5 - fc在体内转化为5 - fu ，导致花药或花粉的部分和全部失活。
|