首页
登录
职称英语
Darwin proposed the theory of sexual selection to explain the origin
Darwin proposed the theory of sexual selection to explain the origin
游客
2024-01-11
10
管理
问题
Darwin proposed the theory of sexual selection to explain the origin of ostentatious
plumage in certain bird species, maintaining that the ornate features of males are a
consequence of female mate selection based on an
Line abstract aesthetic sense, not unlike the process of animal breeders producing
(5) fancy-male varieties of pigeons by conscious artificial selection. Wallace
suggested an alternative explanation: through greater physical energy the most
highly adorned males are able to win the competition with rival males.
Meanwhile Huxley pointed out that male adornment is instrumental in
establishing dominance relationships among males: adornment reduces the
(10) physical activity necessary to intimidate rivals.
However, Jacobs later examined the process of female choice, concluding
that what appeared to be choice of an adorned male by a female was really a
mutual attraction to a certain reproductive site. Mate selection requires an
awareness of features characteristic of a suitable breeding site, which might be
(15) mirrored in the ornamentation of the male, and thus mate selection is related
directly to adaptive niche specialization. From this insight, Austin proceeded to
develop a food-courtship theory of mate selection: the population most efficient
in use of the energy available in a particular niche will be the fittest to survive
there. Through natural selection, organisms will tend to become specialized to
(20) form isolated populations, each adapted to utilize the energy most efficiently
that is available in a particular niche and this process of segregation and
specialization of populations is facilitated by employing in the mating process
samples of the food available in the preferred niche. In particular cases, the
male may display the food to the female or feed it to her in the courtship
(25) ceremony, maybe bearing permanent representations of specific foods on his
plumage, and the female may be attracted to the male for these representations
of the territorial foods.
Austin’s theory may be applied to the case for mate choice among
peafowls, whose males’ "eyespotted" tail feathers bear a striking resemblance
(30) to blue berries. According to the food-courtship theory, it is because their
plumage bears representations of food that peacocks attract peahens, which may
explain why males with the most "eyespots" on their tail have the greatest
mating success. Not inconsistent with a possible role of the "eyespots" in
reproductive competition among males and in aesthetic selection, this
(35) explanation seems more plausible than the suggestion that by selecting mates
according to the perfection of their tail-feather "eyespots", peahens are able to
identify mates with the greatest "fitness". This process, bringing together
males and females of similar tastes and physiologies, may lead to speciation.
Some of the male display features may come to be involved in species
(40) identification, and it has also been noted that male adornment could have a dual
function, repelling rival males as well as attracting females. [br] It may be inferred from the passage that the most recently accepted theory of peafowl "eyespots" contradicts, in particular, the ideas of
选项
A、Jacobs
B、Wallace
C、Austin
D、Darwin
E、Huxley
答案
B
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3352874.html
相关试题推荐
A、Flouren’stheorywasbasedonabeliefinaunitarysoul,whereasGall’swasn
Ofthevariousschemesthathavebeenproposedtomodelhowgenetranscriptionm
A、illustratethatrelativitytheoryremainsausefultoolindeterminingthetop
HACKNEYED:A、carefulB、acceptableC、handyD、gaudyE、originalE
FETID:A、fragrantB、thickC、originalD、balancedE、glowingA
A、ThemeteorsfoundonEarthweretooyoungtohaveoriginatedfromtheimpacts
FAUNA:ANIMALS::A、flora:plantsB、vegetation:aboriginalsC、fowl:amphibiansD、liv
A、Atheoryisproposed,considered,andthenamended.B、Opposingviewsareprese
A、appreciationofthetheory’sabilitytoexplainthedisappearanceofcertainc
SATE:A、famishB、desiccateC、emaciateD、originateE、guzzleA
随机试题
Theearliestprocessofmakingpaperwasdonealmost5,000yearsagoinEgyp
Duringthe1920s,mostadvocatesofscientificmanagement,FrederickTaylorsmet
[originaltext]Yourassignmentsthistermwillbetowritetwomajorresearc
邹明,40岁,月工资8000元,参加了社会保险;妻子37岁,无工作收入;儿子13
下列各项中,不符合内部牵制的要求的是()。A、出纳人员管票据 B、出纳人员
有些药材的油质泛出药材表面,或因药材变质后表面泛出油样物质,这种现象称为()。
Thechangeinthatvillagewasmiraculou
门静脉高压症患者门腔静脉交通支曲张,这4个交通支不包括A:食管下段与胃底交通支
各种运输方式内外部的各个方面的构成和联系,就是( )。 A.运输系统
以下表示货币的时间价值的利息率是()。A.企业的加权平均资本成本 B.没有风险
最新回复
(
0
)