According to the formation of the apomitic embryos, apomixis could be divided into three major types: diplospory, apospory and adventive embryony.

按其胚體發(fā)生的途徑，無融合生殖可分為二倍體孢子生殖、無配子生殖和不定胚生殖三種類型国产黄在线观看免费观看网站。

In angiosperms, a diploid embryo may develop from a cell of the nucellus or chalaza; this is also apospory.

在被子植物中又黄又湿又刺激一区二区三区。二倍體的胚胎可以從珠心或合點的細胞發(fā)育而來，這也可以被稱為無孢子生殖日韩成人教师在线播放视频。

Apospory The devlopment of the gametophyte directly from the cell of a sporophyte, thus bypassing meiosis and spore production.

無孢子生殖：配子體的發(fā)育直接來自孢子體的細胞而不經(jīng)過減數(shù)分裂和孢子產(chǎn)生的生殖過程日韩第一区自拍视频在线观看网站。

The life-cycle of C.baileyi in Beijing duck and in the CAM of chicken embryowas studied with both the light-microscope and the Nomarski interference-contrastmicroscopy.The results indicated that the life-cycle within duck was simillar tothat of CAM.It included excystation, merogony,gamogonyand sporogony.The thin-walled oocyst was first observed and described in China.

借助普通光學(xué)顯微鏡和微分干涉顯微鏡對C.baileyi在北京鴨體內(nèi)的生活史和在雞胚絨毛尿囊膜上的生活史進行了較詳細的研究，結(jié)果表明：C.baileyi在北京鴨體內(nèi)和在CAM上的生活史相同特一级AAAAAA色，主要包括"脫囊—裂殖生殖—配子生殖—孢子生殖"四個階段户外露出国产一区。

Nevertheless, the mosquitoes provide a physiological milieu, for sporogony of the malaria parasites.

已知蚊蟲天然免疫系統(tǒng)在瘧原蟲穿壁、卵囊發(fā)育和子孢子移行進腺等過程中產(chǎn)生包括局部和全身性多位點的免疫反應(yīng)黄频又色又硬又爽，同時蚊蟲為瘧原蟲孢子生殖階段提供必不可少的生理環(huán)境9999免费视频。

The development of a gametophyte directly from a sporophyte without the occurrence of meiosis or spore formation.

無孢子形成，無孢子生殖三级片免费网站视频，無孢子狀態(tài)沒有經(jīng)過減數(shù)分裂或孢子形成而直接由孢子體進行的配子體發(fā)育

To understand the degeneration of unfertilized aposporous embryo sac in an aposporous species Pennisetum squamulatum, the central cell in the unfertilized embryo sac was characterized ultrastructurally.

為理解植物無孢子生殖胚囊未受精條件下的退化，對無孢子生殖植物非洲狼尾草未受精成熟胚囊中央細胞退化做了細胞形態(tài)學(xué)研究在线99热这里只有精品。

The results showed that the sex ratio of trees was 1 m 2 f, and the natural T. cuspidata tree was able to sexually reproduce for many years. Male trees had fecundity when the diameter at breast height ranged from 1.5 cm to 92 cm, while female trees had fecundity when the DBH from 9.5 cm to 68.1 cm. Male trees typically flowered at the age about 20 years earlier than female trees. The numbers of microstrobili were 3 times more than that of megastrobili, and only 1/10 megastrobili developed into seed. The numbers of strobili and seed were correlated with DBH, crown diameter and height of trees; however, no significant correlations were observed with other site factors. Numbers of strobili decreased from the upper to lower canopy layers, while the quantity of seed decreased from the middle, upper to lower canopy layers. Seed-setting rate increased from the upper to lower canopy layers. Numbers of strobili and seeds in different directions of the canopy were not uniform, but the differences weren't significant.

結(jié)果表明：現(xiàn)實東北紅豆杉天然種群中另类欧美97性XXXXX，♀♂性比為1：2；天然東北紅豆杉有性生殖持續(xù)時間長久久久免费播放视频，雄株胸徑在1.5~92cm最近2018中文字幕MV，雌株胸徑在9.5~68.1cm保持生殖狀態(tài)，雄株較雌株早約20年進入花期欧美妓女视频；天然東北紅豆杉小孢子葉球數(shù)量平均為大孢子葉球數(shù)量的3倍精品性欧美牲交在线视频，大孢子葉球轉(zhuǎn)化為果實的數(shù)量不足1/10，孢子葉球數(shù)量三级片免费网址、結(jié)實數(shù)量與樣株的胸徑偷窥精品视频国产免费、冠幅、樹高顯著相關(guān)a一黄色网，與其他立地因子相關(guān)不顯著在线欧美三级片；孢子葉球數(shù)量在冠層間的分布呈現(xiàn)由上至下的遞減規(guī)律，而結(jié)實數(shù)量在冠層間沿中国产白白视频在线观看、上欧美视频精品二区、下遞減，結(jié)實率沿冠層自上而下遞增免费被操视频在线观看；孢子葉球與結(jié)實數(shù)量在樹冠不同朝向上也呈現(xiàn)出一定的特點亚洲性色狠操，但總體上差異不顯著。

Cerevisiae, reproducing by budding and from ascospores and capable of fermenting carbohydrates.

酵母菌：一種酵母菌屬的單細胞真菌不下载看a人免费大片，尤指 S.cerevisiae 人人艹在线视频，通過發(fā)芽和從子囊孢子生殖，能夠發(fā)酵成碳水化合物

Asexual reprodution is called binary fission which simply means a cell divides into two identical cells.

無性生殖的方式有：分裂生殖、出芽生殖乱码视频午夜在线观看、孢子生殖人人透人人操人人干、營養(yǎng)生殖。