首页
登录
职称英语
What evolutionary change in birds led to nest building? [br] [originaltext] M
What evolutionary change in birds led to nest building? [br] [originaltext] M
游客
2024-10-16
1
管理
问题
What evolutionary change in birds led to nest building? [br]
Many egg-laying animals merely lay their eggs and leave. Turtles for instance, leave their eggs to hatch on their own. The current theory about birds is that the earliest birds did just that when they were cold-blooded creatures living in warm places. However when they became warm-blooded creatures living in cold places they had to remain on the eggs to keep them warm. The process we call incubation. For this they needed a place--a nest. Very likely the first nests were just primitive depressions scrape into the ground. Even now many species still lay eggs in this sort of crude nests. In fact every spring a mother killdeer will lay her eggs in some pebbles along the edge of the parking lot just outside the buildings in the cities. Primitive nests on the ground were fine for some birds but other birds began to elevate their nests in branches perhaps to avoid predators. These early elevated nests were probably loose platform nests, like a robin’s nest.
选项
A、A primitive type of nest.
B、An elevated nest.
C、A typical cup-shaped nest.
D、A nest of twigs and branches.
答案
A
解析
语义理解题。讲到早期的鸟巢是建在地面上时,讲话者接着举例说:“In fact every spring a mother killdeer will lay her eggs in some pebbles along the edge of the parking lot just outside the buildings in the cities.”可知讲话者举例是想说明一些比较粗糙原始的鸟巢。选项A为正确答案。
转载请注明原文地址:https://tihaiku.com/zcyy/3803188.html
相关试题推荐
Whatevolutionarychangeinbirdsledtonestbuilding?[br][originaltext]M
Whatevolutionarychangeinbirdsledtonestbuilding?[br][originaltext]M
Whatevolutionarychangeinbirdsledtonestbuilding?[br][originaltext]M
Whatdoesthewordpoppyinthispassagereferto?[br][originaltext]No
Whatdoesthewordpoppyinthispassagereferto?[originaltext]November
Whatwillbemosteffectiveaboutpersonalinterviewing?[br][originaltext]
Whatwillbemosteffectiveaboutpersonalinterviewing?[br][originaltext]
Whatwillbemosteffectiveaboutpersonalinterviewing?[originaltext]Pers
Thisbookdealswithquestions______China’sAgrarianRevolutionaryWar.A、conce
Whatcanweknowabouttheelephantsinzoos?[br][originaltext]Theeight
随机试题
TheIELTSExamIELTS:InternationalEnglishLanguag
Scientistshavecreatedatomatothatcangrowonsaltywater.Theplantis
Individualsandbusinesseshavelegalprotectionforintellectualpropertyt
在软件需求规格说明书中,有一个需求项的描述为:“探针应以最快的速度响应气压值的变
(2019年真题)20×7年12月2日,甲公司销售商品给乙公司,开出
麻子仁丸适用于()A.阴虚便秘 B.血虚便秘 C.阳虚便秘 D.
关于投资组合X、Y的相关系数,下列说法正确的是()。A:一个只有两种资产的投资组
患者,女,28岁,主诉牙龈长肿物5个月,并慢慢增大,影响进食。在确诊前,最应询问
根据我国金融业分业经营与分业管理的要求,投资基金管理公司经营活动及行为由()负责
关于工程造价的分部组合计价原理,下列说法正确的是()。A.分部分项工程费=
最新回复
(
0
)