时间:2018-12-05 作者:英语课 分类:英语听力文摘 English Digest


英语课

   The Future Of Males


  Have you ever heard predictions that one day women will be able to have babies without men? It turns out that some species of the Whiptail lizard 1 have figured out how to do this and completely eliminated the male sex.
  Females Cloning Themselves
  The females have the ability to lay eggs that hatch and grow into healthy lizards 2 without needing to be fertilized 3 by a male. The offspring are exact and complete genetic 4 duplicates of the mothers.
  Essentially 5 the females are clonnig themselves.
  Role Playing
  If that weren’t enough, the female lizards take turns role-playing. They perform a mating ritual in which one lizard acts like the male, and the second lizard acts like the female. The ritual causes the lizard acting 6 as the female to ovulate and lay her eggs. Then, a few weeks later, the two lizards switch roles and repeat this process so that the second female will be able to ovulate and lay her eggs.
  Genetic Variation
  It raises a lot of interesting questions. For example, it’s not clear how well an all female species can evolve and adapt to environmental changes. A species’ survival depends in part on variation among its members. If all the members of a species are identical, chances are greater that something like a change in the climate or a disease will wipe them all out.

1 lizard
n.蜥蜴,壁虎
  • A chameleon is a kind of lizard.变色龙是一种蜥蜴。
  • The lizard darted out its tongue at the insect.蜥蜴伸出舌头去吃小昆虫。
2 lizards
n.蜥蜴( lizard的名词复数 )
  • Nothing lives in Pompeii except crickets and beetles and lizards. 在庞培城里除了蟋蟀、甲壳虫和蜥蜴外,没有别的生物。 来自辞典例句
  • Can lizards reproduce their tails? 蜥蜴的尾巴断了以后能再生吗? 来自辞典例句
3 Fertilized
v.施肥( fertilize的过去式和过去分词 )
  • The study of psychology has recently been widely cross-fertilized by new discoveries in genetics. 心理学研究最近从遗传学的新发现中受益匪浅。
  • Flowers are often fertilized by bees as they gather nectar. 花常在蜜蜂采蜜时受粉。
4 genetic
adj.遗传的,遗传学的
  • It's very difficult to treat genetic diseases.遗传性疾病治疗起来很困难。
  • Each daughter cell can receive a full complement of the genetic information.每个子细胞可以收到遗传信息的一个完全补偿物。
5 essentially
adv.本质上,实质上,基本上
  • Really great men are essentially modest.真正的伟人大都很谦虚。
  • She is an essentially selfish person.她本质上是个自私自利的人。
6 acting
n.演戏,行为,假装;adj.代理的,临时的,演出用的
  • Ignore her,she's just acting.别理她,她只是假装的。
  • During the seventies,her acting career was in eclipse.在七十年代,她的表演生涯黯然失色。
学英语单词
accupril
air-bounce
angle of winning-block
aniculus ursus
as dry as a brick
autophytic plant
Beamahs
biological module, biocapsule
building code
bulletin boards
butyric acid number
cad-cam
carinate venter
cauterion
Chain slack!
clock-doubled
Clodomira
collision-avoidance warning
corbicula insularis
Corlutina
counthood
cross-country skiings
demand with menaces
drinks in
dusts
E scan
effective decay constant
Egyptian lace
eprlf
Ergersheim
F test
final statement of accounts
fling together
gazzanigas
Giglio Castello
hand chain hoist
hydroxyglutaric acid
indult
infinitely near point
International Data Encryption Algorithm
intralesionally
IPC
isothermal process
judicial mortgage
kienb?ck's dislocation
lifegiving
light alloy
lusa
macrophage aggregating factor
marine plain
memory mapped i/o
Metanilamido
misdoubts
mismos
Mohawkian series
moosehide
more than love
neon 20 beam
next-to-impossible
Nycholaite
Nymphaea stellata
oblique rhumb line
off-roading
office of technology utilization
omise
overpitches
plain-woven
policy adviser
positivistic social science
power control circuit
pre-employ
primary geologic structure
prostitute
pulsed-bed sorption
reactance bridge
reprick
revaluation of excess
Ringsaker
Royal Air Force Museum
Rules of Geometry
sampling of continous-time signal
scaleoftwo
sequence packing
ship net
Silybum marianum Gaertn.
slim file
so much
spar-rib
stability of dam foundation
steepness of terrain
storm area
stratified bed ion exchange
sturgeonlike
took point
total earning
Tree-glue
tri-gun color picture tube
unopened parachute
vicks
waiveth
workmen's compensation acts
zapato