雌性单性生殖,孤雌生殖

female parthenogenesis的用法和样例:

例句

  1. In nature, clones are derived from a single parental organism or cell by mitotic cell division, asexual reproduction, or parthenogenesis.在自然条件下来源于有丝分裂所产生的单个亲本细胞或生物体,还可能来源于无性繁殖或单性生殖。
  2. Two diploid gametes may fuse to give a tetraploid zygote, or gamete may develop directly by parthenogenesis.两个二倍体配子融合可能产生一个四倍体合子,这样的配子也可以通过孤雌生殖直接发育而来。
  3. However, reproduction is often by parthenogenesis since polyploid animals are often sterile.然而,它们常常是通过孤雌生殖繁殖的,因为多倍体动物往往不育。

In all societies, male and female roles are regarded differently. The mother role is universally carried out by women, which is biologically based. Roles defined by sex also characterize the economic

发表于:2018-12-07 / 阅读(82) / 评论(0) 分类 老友记精校版第1季

The victory of Donald Trump in the 2016 presidential election came as a surprise to many people in the United States. Most political observers predicted Trump would lose the election to Hillary Clinton. But he won, in large part because of older male

发表于:2018-12-07 / 阅读(52) / 评论(0) 分类 2017年VOA慢速英语(六)月

Ditto is one of the latest high-tech companies to set up shop in San Francisco, California. The company has designed an interactive platform using high tech facial recognition software where you can check your appearance when trying out spectacle fra

发表于:2018-12-19 / 阅读(81) / 评论(0) 分类 英闻天下

a female pharmacist A man asked a female pharmacist,Do you have Viagra? Yes, she answered. Does it work? he asked. Yes, she answered. Can I get it over the counter? he asked. You can if you take two at a time, she answered. Notes: 1. A man aske

发表于:2018-12-26 / 阅读(67) / 评论(0) 分类 英语笑话(MP3+文本)

说一口流利的英语,从简单的单词开始。 听听,读读,背背,今天你的词汇量又增加了5个。 单词/词义 中英例句 单词听读 way [ wei ] We have to go a long way t

发表于:2018-12-30 / 阅读(92) / 评论(0) 分类 每日攻克5词

Amy Winehouse feeling the pressures of fame One of the UK's top young female vocalists has cancelled a series of high-profile European concerts following a short stay in hospital after suffering severe exhaustion . Smokey-voiced jazz and soul singer

发表于:2019-01-02 / 阅读(126) / 评论(0) 分类 Take Away English

Grammar Girl here. Today's show will cover the difference between the words woman and female. First we had Nancy Pelosi taking over as Speaker of the House, then Hillary Clinton running for president, and now we have Sarah Palin as the Republican vic

发表于:2019-01-02 / 阅读(75) / 评论(0) 分类 英语语法 Grammar Girl

Todays topic is the use of feminine nouns such as actress and comedienne. These days, people often see such terms as sexist, but it's also common to hear at least some of them. So what exactly are the modern rules for using such terms? Actually, this

发表于:2019-01-02 / 阅读(63) / 评论(0) 分类 英语语法 Grammar Girl

Broadcast: Feb 24, 2003 By Jill Moss This is the VOA Special English Development Report. Activists for the rights of women have declared a yearly observance to oppose the cutting of female sex organs.

发表于:2019-01-02 / 阅读(106) / 评论(0) 分类 VOA2003(上)-社会广角

By Cathy Majtenyi An international conference to press for the eradication of female genital mutilation in Africa and around the world opened in Kenya Thursday.

发表于:2019-01-07 / 阅读(78) / 评论(0) 分类 VOA2004(下)--新闻盘点

AS IT IS 2016-02-13 UN: More Female Genital Mutilation Than Thought Millions more girls and women are victims of female genital mutilation than previously thought, said the United Nations (UN). UNICEF is the UN childrens agency. They said in a report

发表于:2019-01-12 / 阅读(86) / 评论(0) 分类 2016年VOA慢速英语(二)月

Female Olympians Get Motivated for 2016 Games Ije Enwerem has been throwing the discus for four years. She's thought to be a contender for the next summer Olympics, in Rio, four years from now. Being female, she says, has made her work harder. No-one

发表于:2019-01-13 / 阅读(74) / 评论(0) 分类 VOA标准英语2012年(八月)

USAID Boosts Female Entrepreneurs in Pakistan An accomplished embroiderer with no formal education, Jamila struggled for years to augment her husbands income by doing stitching and beadwork in a poor Karachi district. Thanks to USAID-funded business

发表于:2019-01-13 / 阅读(63) / 评论(0) 分类 VOA标准英语2012年(三月)

By Carolyn Weaver New York City 18 November 2009 A new film focuses on the fight by African activists against an ancient practice that is still performed each year on millions of girls: female circumcision, often known as FGM, or female genital muti

发表于:2019-01-14 / 阅读(91) / 评论(0) 分类 VOA标准英语2009年(十一月)

China's first female astronauts could be sent into space on Shenzhou 10, which is scheduled to be launched in the coming two years. CRI's Shuangfeng files this report from Jiuquan. It has been 48 years since the first female astronaut in the world, V

发表于:2019-01-19 / 阅读(73) / 评论(0) 分类 世界各地新闻集锦

80 雌性荷尔蒙不能缓解心脏病发作 DATE=8-9-01 TITLE=SCIENCE REPORT- Female Hormones and Heart Disease BYLINE=Nancy Steinbach (Start at 59

发表于:2019-01-30 / 阅读(82) / 评论(0) 分类 科技之光

ECONOMICS REPORT - Up to 1.6 Million Female Employees Could Be Included in Sex-Discrimination Case Against Wal-Mart By Mario Ritter Broadcast: Friday, July 02, 2004 This is Bob Doughty with the VOA Sp

发表于:2019-01-30 / 阅读(84) / 评论(0) 分类 健康与经济

DEVELOPMENT REPORT - Study Links Custom of Female Cutting to Infertility By Jill Moss Broadcast: Monday, August 29, 2005 I'm Bob Doughty with the VOA Special English Development Report. New research s

发表于:2019-01-30 / 阅读(83) / 评论(0) 分类 农业与发展

TEHRAN, Sept. 14 (Xinhua) -- One of the three detained (被扣留的) U.S. hikers(徒步旅行者) left Iran on Tuesday evening after being released on bail of 500,000 U.S. dollars few hours earlier. Xinhua reporter was told in Tehran's Mehra

发表于:2019-02-03 / 阅读(64) / 评论(0) 分类 英语新闻

By Lisa Schlein Geneva 18 September 2007 The United Nations Children's Fund says the practice of female genital mutilation remains unacceptably high in Egypt.But, a UNICEF representative tells VOA the Egyptian government is committed to ending this

发表于:2019-02-12 / 阅读(126) / 评论(0) 分类 2007年VOA标准英语(九月)
学英语单词
absorbent metal
action wheel
air loans
All Japan Seamen's Union
aplasia congenitatis
Ashley Mine
asoes
be on the warpath
be out on bail
bed board
bent turbodrill
Black-Chinned
broken metaphor
c.w.s.
cable-line parameter
canon of taxation
carotae
clearing export declaration
coaxial detector
coli infection
companion seta
concept-dependent
confinement feeding
counterpressure die casting
crampy pain
Cryptomorphite
death-struck
dimensionless parameter
discoid cataract
dizziness due to yang deficiency
double resonator klystron
double-uncle
dropping liquid
endoclosure
enniss
espresso shops
eusden
expansive cement
flight blade
foil plugger
frictional compatibility
gargle
gloop
goodenia families
governing difference equation
grass peas
gravity separation method
hatchettind
hedychium
horizontal parboiling dryer
husi
jehadists
juxtaposing
look-down shoot-down
LQR
mark card to floppy disk
mega-kelvins
methyl eicosanoate
milli-farads
move one's boots
mumbo jumbos
Myisamchk
n-ary predicate variable
neutron magnetic mo-ment
nonreferentially
nose-picks
operational-services
parish pump
patronym
phenomenological geography
picture of health
Pinckney
plous
plug in coil
polar invasion
quench smoking flax
reciprocating cam follower
remotely operated pipette
reservoir-induced earthquake
roller mat conveyor
safe arrival
safe drinking water
salonen
sanguification
sealed proposals
slow neutron activation method
summit of vertical curve
supervisure
Sφnder Bjerre
tech incubator
tendines
time machines
unbosom yourselves
Vecsés
vice identifier
Vicq d' Azyr's operation
viscoplasticity
volume array
Williamson Glacier
wish on
you are welcome to
z-aminoethanethiol