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
19
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、On the ground.
B、In cold places.
C、On the highest branches of trees.
D、Inside tree trunks.
答案
A
解析
语义理解题;短文中讲到“Very likely the first nests were just Primitive depressions serape into the ground.”可知早期的鸟巢一般是建在地面上的。选项A为正确答案。
转载请注明原文地址:https://tihaiku.com/zcyy/3803187.html
相关试题推荐
Whatevolutionarychangeinbirdsledtonestbuilding?[br][originaltext]M
Whatdoesthewordpoppyinthispassagereferto?[br][originaltext]No
Whatdoesthewordpoppyinthispassagereferto?[originaltext]November
Whatwillbemosteffectiveaboutpersonalinterviewing?[br][originaltext]
Whatwillbemosteffectiveaboutpersonalinterviewing?[br][originaltext]
Whatwillbemosteffectiveaboutpersonalinterviewing?[originaltext]Pers
Whereisthisconversationtakingplace?[br][originaltext]M:You’llbeinRoo
Whereisthisconversationtakingplace?[originaltext]M:You’llbeinRoom207.
Thisbookdealswithquestions______China’sAgrarianRevolutionaryWar.A、conce
Whatcanweknowabouttheelephantsinzoos?[originaltext]Theeighteleph
随机试题
下列有关SID码的表述中,正确的是( )。A.SID码是光盘复制序次码的简称
某投资公司拟投资兴建一座化工厂,该项目已进入可行性研究阶段,该阶段主要研究范围有
肺结核化学治疗原则是A.早期、联合、适量、规律、全程 B.仅早期使用抗结核药
培育和践行社会主义核心价值观,要切实做到勤学、修德、明辨、笃实。蔡元培曾经说过:
下列不属于组胺H1受体阻断剂抗过敏药的是A.扑尔敏 B.氯丙嗪 C.异丙嗪
某公司的几位董事正在为寻找合适的总经理接班人而暗暗费神。由于缺乏外部招聘经验,因
(2017年真题)下列关于企业投资性房地产会计处理的表述中,正确的有( )
根据《促进产业结构调整暂行规定》,产业结构调整的方向和重点不包括( )。A.健
横道图比较法有()。A.匀速横道图 B.非匀速双比例单侧横道图法 C.
不属于阻塞性肺气肿的体征是 A.桶状胸 B.触觉语颤增强 C.肺下界和肝
最新回复
(
0
)