首页
登录
职称英语
Fossil formations like the Burgess Shale show that evolution cannot always b
Fossil formations like the Burgess Shale show that evolution cannot always b
游客
2024-01-03
72
管理
问题
Fossil formations like the Burgess Shale show that evolution cannot always be thought of as a slow progression. The Cambrian explosion involved rapid evolutionary diversification, followed by the extinction of many unique animals. Why was this evolution so rapid? No one really knows. Many zoologists believe that it was because so many ecological niches were available with virtually no competition from existing species. Will zoologists ever know the evolutionary sequences in the Cambrian explosion? Perhaps another ancient fossil bed of soft-bodied animals from 600-million-year-old seas is awaiting discovery.
What can be inferred from paragraph 7 about why the Cambrian explosion is so unusual?
选项
A、It generated new ecological niches through the extinction of many unique animals.
B、It was a period of rapid evolution, and evolution is often thought of as a slow process.
C、It is a period whose evolutionary sequences are clearly marked.
D、It generated a very large number of ancient fossil beds containing soft-bodied animals.
答案
B
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3330264.html
相关试题推荐
TheEvolutionofthePhotofitSecuritytechnology:Ane
TheEvolutionofthePhotofitSecuritytechnology:Ane
TheEvolutionofthePhotofitSecuritytechnology:Ane
TheEvolutionofthePhotofitSecuritytechnology:Ane
TheEvolutionofthePhotofitSecuritytechnology:Ane
TheEvolutionofthePhotofitSecuritytechnology:Ane
TheEvolutionofthePhotofitSecuritytechnology:Ane
"TheEvolutionofBirds"BirdsBeganasFeatheredRepti
"TheEvolutionofBirds"BirdsBeganasFeatheredRepti
"TheEvolutionofBirds"BirdsBeganasFeatheredRepti
随机试题
Itseemsoilleavesfromthispipeforsometime.We’llhavetotakethemachine
Weallknowthatwedon’tgetenoughsleep.Buthowmuchsleepdowereally
Theyclaimedthattheydidnotarrangethedemonstration.Itwasabsolutely____
[originaltext]AlbertSchweitzerwasbornin1875inAlsace.Atthattime,i
1.现在许多人在为人处事方面只关心自己的利益而很少顾及他人2.互相理解对于说话的双方都非常重要3.为此,我们应该……OntheImport
商业银行负债业务的主要风险包括( )。A.操作风险 B.市场风险 C.流动
劳动法律关系的主要形态是()A.劳动行政法律关系 B.劳动合同关系 C.劳
世界卫生组织提出的健康教育的定义是()A.其目的是帮助并鼓励人们有达到健康状态的
县级人民政府将国有非货币性资产明确以股权投资方式投入企业,企业应作为资本公积处理
关于对超豪华小汽车征收消费税的规定下列说法正确的是()。A.纳税环节是生产环节
最新回复
(
0
)