这些生物体通过单性生殖进行繁殖。
细胞可以转换成用于协助繁殖项目的生殖细胞，以帮助增加濒危物种基因库里的品种。
The cells could be converted into germ cells for use in assisted breeding programmes to help diversify the gene pools of endangered species, she says.
生殖力是指大量繁殖的能力。
合子后生殖分离是由杂种后代的无性繁殖而引起的。
Postzygotic reproductive isolation occurs by the inviability of the hybrid offspring.
这些进化理论解释了一个谜：牺牲自我“生殖适应性”(其生存和繁殖的能力)的有机体如何能够进化。
These evolutionary theories explain a puzzle: how organisms that sacrifice their own "reproductive fitness" - their ability to survive and reproduce - could possibly have evolved.
轮虫并不普通，因为他们的繁殖方式是孤雌生殖(确实，一些物种甚至只有这一种繁殖方式)。
Rotifers are unusual in that they often reproduce by parthenogenesis (some species, indeed, can reproduce only in this way).
使用干细胞技术，由richardr. Berhringer博士带领的德克萨斯州M.D.A nderson肿瘤中心的生殖科学家们利用两只公鼠成功繁殖出雌性和雄性老鼠后代。
Using stem cell technology, reproductive scientists in Texas, led by Dr. Richard r. Berhringer at the M.D. Anderson Cancer Center, have produced male and female mice from two fathers.
本文概述了生殖道的基础知识，以及这些知识可以如何用来提高繁殖的成功。
This article outlines the basics of the reproductive tract and how this knowledge can be used to increase reproductive success.
罗非鱼一年能够繁殖数代，生殖能力很强。
Tilapia are very fertile, and reproduce several offspring every year.
更好地了解奶牛生殖道的解剖和生理，可成为你提高受孕率和繁殖效率的优势。
Better understanding of the anatomy and physiology of your cows' reproductive tract can be used to your advantage to increase conception rates and reproductive efficiency.
当挑一只种母做繁殖的时候，繁殖者必须懂得种狗母亲的结构和生殖记录。
When selecting a stud dog for breeding, the breeder must study the structure and the reproductive record of the stud dog's dam.
贝勒医学院的研究人员偶然发现，饲养在玉米棒子作为草垫的大鼠“既不繁殖也不展示生殖行为。”
Researchers at Baylor College of Medicine accidentally discovered that rats raised on corncob bedding "neither breed nor exhibit reproductive behavior."
看看生殖系统，繁殖对物种的生存至关重要。
Look at the reproductive system - reproduction is essential for survival of the species.
方法按两代一窝繁殖法进行生殖毒性试验。
Methods a two generations-one nest reproductive test was carried out.
繁殖力，生殖力尤指大量产生后代的能力；生殖力。
The capacity for producing offspring, especially in abundance; productiveness.
生殖系统是由一系列完成繁殖后代、延续种族的器官所组成。
The reproductive system is composed of a series of organs responsible for reproduction of the human race.
应用组织学方法比较观察了猪繁殖与呼吸综合征病毒（PRRSV）弱毒细胞疫苗与灭活疫苗生殖道黏膜免疫的效果。
The effect of mucosal immune of porcine reproductive and respiratory syndrome virus (PRRSV) attenuated and disactived vaccine was investigated by histological method.
大量证据表明环境激素可以干扰人类生殖健康和其他动物的繁殖能力。
Numerous evidences show that the environmental hormone can disturb the reproductive health of humankind and the multiplication of other animals.
报道了闽江口海域鳓鱼的生殖群体结构、生长特性、死亡参数和繁殖、摄食习性等生态学资料。
The structure of reproductive stock, the growth character the mortality parameter and breeding, feeding habits of Chinese herring in the estuary of Mingjang River are reported in this paper.
蚜虫是一类刺吸式口器的小型昆虫，孤雌生殖、世代周期极短、繁殖率高，这使得蚜虫种群增长迅速。
Aphids are small sap-sucking insects whose parthenogenetic reproduction and short generation time allow them to increase population size rapidly.
要明了猪细小病毒对猪生殖系统的影响，重要的是要认识到猪生殖系统感染细小病毒常常发生，但是猪却不一定发病；但有些时候细小病毒感染一起繁殖系统疾病。
To understand the role of PPV in reproduction it is important to realize that reproductive infection usually occurs without disease, but sometimes there is infection with reproductive disease.
它们依靠芽孢来进行自我繁殖的方式效率很高，以至于它们的孢子生殖速度快赶上腐生物的瞬间爆发了。
Their spore-based reproduction is so efficient that they bud off sporelike organisms known as Saprolings almost constantly.
测定分析鱼类生殖力、产卵期、繁殖群体的年龄结构及产卵类型。
The spawning times, absolute fecundities, age structures of breeding population, and spawning types of fish were also studied.
他们认为应当供奉附在兔子身上的守护神，把它作为生殖的象征，代表着高繁殖率，健康和繁荣。
They believed that the numina intended for rabbits to be put upon pedestals and revered as symbols of procreation, reproduction with a high turnover rate, of health, and of prosperity.
通过详细的测量和分析，表明繁殖期成体的机能形态学指标表现出与生殖状态相关的明显而复杂的变化。
In the breeding phase the morphological index in different age – group were shown markedly change related to the breeding condition.
方文：这会导致真社会性动物中主管繁殖的“后”和“工作者”进化出不同长度的寿命和生殖功能。
This would allow for the evolution of divergent life lengths and reproductive value curves between workers and reproductives. Predators fitting this description would include snakes.
并研究各种环境因素对动物生殖过程的影响，这些研究将对提高动物的繁殖率、治疗人类不孕症等方面具有重要意义。
Effects of environmental factors on animal reproduction are also evaluated. These studies will be essential for improving animal fertility and developing contraceptives.
当繁殖者挑选了一只母犬做繁殖，繁殖者必须挑选一只有很好的生殖记录的优质母犬。
When a breeder chooses a dam for breeding, the breeder must select a well-constructed bitch with a good producing record.
当繁殖者挑选了一只母犬做繁殖，繁殖者必须挑选一只有很好的生殖记录的优质母犬。
When a breeder chooses a dam for breeding, the breeder must select a well-constructed bitch with a good producing record.
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