Flowers bisexual, zygomorphic, solitary, often dimorphic (cleistogamous flowers later than chasmogamous ones); pedicels axillary, 2-bracteolate.

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The blind passages make it likely that sperm will be ejaculated into the wrong place and thus fail to fertilise the duck's eggs.

憩室的作用則是讓精液無(wú)法達(dá)到正確的地方來(lái)授精。

Indirect insemination, as in the flour beetle, provides a third possible adaptive advantage.

而類似面粉甲蟲(chóng)的間接授精則提供了第三種可能的適應(yīng)性優(yōu)勢(shì)国产玖玖在线播放。

Since Fisher's time, it has been realized that genes can sometimes influence the chromosome or gamete in which they find themselves so that the gamete will be more likely to participate in fertilization .

自菲希爾的時(shí)代以來(lái)超碰97在线免费观看，科學(xué)家們已意識(shí)到，基因有時(shí)能影響到它們所存在于其中的染色體或配子日日摸日日搞日日射，因此欧美在一区，配子將更有可能參與到授精過(guò)程中來(lái)。

Molecular Human Reproduction publishes articles on the molecular aspects of human reproductive physiology and pathology, endocrinology, andrology, gonad function, gametogenesis, fertilization, embryo development, implantation, pregnancy and contraception.

分子人類繁殖》發(fā)表關(guān)于以下內(nèi)容的分子領(lǐng)域方面的研究文章欧美精品永久在线观看，包括人類生殖生理學(xué)和病理學(xué)欧美日韩国产精东，內(nèi)分泌學(xué)，男性科學(xué)做爽视频在线观看，生殖腺功能，配子發(fā)育日韩天天天添日日，授精www.99riav4.com，胚胎發(fā)育，培植很黄的视频网站，懷孕和避孕免费看九九爱爱视频。

Fertilization played an important role in early calcium uptake by fruit. There was no fertilization in parthenocarpy fruit, and calcium concentration was very high during full inflorescence period.

授精作用對(duì)果實(shí)早期鈣營(yíng)養(yǎng)的吸收具有重要作用色色综合网址，單性結(jié)實(shí)的果實(shí)無(wú)受精過(guò)程，在花前鈣濃度已居很高水平鲁847www。

In this paper, introduced in vitro fertilization and the indications on the basis of the discussion were: Who are the parents of test-tube baby?

本文在介紹體外授精及其適應(yīng)癥的基礎(chǔ)上A片一本污码，分別討論：誰(shuí)是試管嬰兒的父母？

Histological characteristics of reproductive gland,were described and its relations to the cantharidin stored and transferred within or between the adults were discussed. Epicauta mannerheimi ; Mylabris phalerata ; reproductive gland ; histological characteristics ; cantharidin

作者在進(jìn)行兩種芫菁生殖腺解剖后欧美日韩A片ww免费，又初步探究大斑芫菁生殖腺的組織學(xué)特征亚洲精品aaaa在线播放久，目的在于為芫菁的精子貯存、運(yùn)送97操碰免费视频t、授精天天操天天日天天天舔、芫菁素傳遞等過(guò)程提供初步理論依據(jù)。1 材料和方法1 手机看片1024久久亚洲。1 材料細(xì)紋豆芫菁于 1 999年 6月中旬采自福州市郊高

Sows, which had farrowed severeal times, were used in the field trials, and divided into four groups: fresh semen and semen stored for one, two and three days.

授精試驗(yàn)應(yīng)用103頭經(jīng)產(chǎn)母豬黄网站2020免费视频大全，根據(jù)所用精液的保存時(shí)間分為新鮮精液、保存一天操乡村熟女A片网址、兩天及三天的精液四組色哟哟在线视频精品一区二区。

Pollinated by wind-dispersed pollen .

通過(guò)移動(dòng)的花粉來(lái)授精。