查询词典 archegonia

Usually there were two archegonia in a female gametophyte which developed a synchronously at first, and gradually developed in concert.

一个雌配子体中的颈卵器数目通常为2个，它们的发育最初不同步，以后逐渐趋向一致。

Then, approximately 15 months after pollination, archegonia, usually two or three in number, differentiate at the micropylar end of the megagametophyte, and the stage is set for fertilization.

然后， 在授粉后 15个月大约， archegonia，通常二或三在数字中，在 megagametophyte 的 micropylar 结束区别，而且阶段为施肥被设定。

After 13 months culture, sporophytes began to form. Each gametophyte had several archegonia, and only one sporophyte was produced per gametophyte. The first sporophyte frond was simple and had pinnate venation.

抱子体在经13个月的培养后开始产生，每个配子体虽然有许多的藏卵器，但只产生一株孢子体，第一片孢子体的叶片为单叶羽状脉。

Most gymnosperms retain archegonia except for the most advanced genera Gnetum and Welwitschia.

除了买麻藤属和百岁兰属以外大多数裸子植物还保留有颈卵器。

Antheridia occurred in the cushion on the dorsal and ventral surfaces of gametophytes while archegonia were observed on the ventral surface only. On hermaphroditic gametophytes, antheridia and archegonia were usually intermingled. Both types of gametangia were eusporangiate.

藏精器与藏卵器分别在孢子洒播10及12月后发生；藏精器长在中肋的背面及腹面，藏卵器只在腹面发生；两性配子体的藏精器与藏卵器混生一起，两者均属厚囊蕨型。

In culture, spores germinated two weeks after sowing. Gametophyte development is of the "Marattia" type. Gametophyte shape changed from circular, to cordate, to branched. Antheridia and archegonia appeared 10 and 12 months, respectively, after spores were sown.

培养时其孢子在洒播二周后开始发芽；配子体以「观音座莲舅」型发育，配子体生长过程由圆形转心脏形再形成分支。

A similar section through the female plant reveals several bottle-shape archegonia, the female reproductory organs.

通过雌株末梢的纵切面所现出的几个瓶状的颈卵器，这就是雌性生殖器官。

A sheathlike outgrowth of tissue in bryophytes protecting the archegonia or antheridia in certain liverworts.

总苞：1 是一种由被子植物花序下方的环状苞叶组成的保护结构。2 是苔藓植物外方具有的鞘状结构，在某些苔类中用来保护颈卵器或精子器。

In organisms showing sexuality, the gametes are of two types: male and female. They may be produced in special organs (e.g. carpel and anther in angiosperms, archegonia and antheridia in lower plants and some algae). The gametes may be derived from the same parent AUTOGAMY0 or from two different parents

在显示性别差异的器官中，配子体分两种：雄配子与雌配子，二者可能在特殊器官中产生（例如：被子植物的心皮或其它结构、低等植物及某些藻类的颈卵器和精子器）配子可以来自同一亲本或由两个不同亲本分别产生。

Commonly, the eggs of all archegonia are fertilized and begin to develop into embryos.

普遍，所有 archegonia 的蛋被施肥而且开始进入胚胎(polyembryony 的现象)之内发展。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。