解析:第一段最后一句“This rapid origin and diversification of animals is often referred to as “the Cambrian explosion””意思是:如此迅速的动物起源和多样化被认为是“寒武纪大爆发”。 5. 根据第二段,以下哪项不是古生物学家对寒武纪大爆发提出的问题? (Negative Factual Information Question) a) 为什么...
The term “Cambrian explosion” refers to the geologically brief period during which all modern animal groups evolved. ●Little is known about the… ●While animal fossils… ●Although the reasons for the… Answer Choices ○Little is known about the stages of evolution during the Cambrian period,...
We can identify at least four factors that might have contributed to the Cambrian explosion. First, the oxygen level in our atmosphere may have remained well below its present level until about the time of the Cambrian explosion. Thus, the rapid diversification in animal life may have occurred ...
We can identify at least four factors that might have contributed to the Cambrian explosion. First, the oxygen level in our atmosphere may have remained well below its present level until about the time of the Cambrian explosion. Thus, the rapid diversification in animal life may have occurred ...
[earth,life,life-form,animals10%,cambrian,topic:cambrian explosion] 1. The wordsignificantin the passage is closest in meaning to2 ¡ numerous ¡ important ¡ unexplained ¡ sudden 2. The wordrelativelyin the passage is closest in meaning to3 ...
The term "Cambrian explosion" refers to the geologically brief period during which all modern animal groups evolved. ● ● ● A.Little is known about the stages of evolution during the Cambrian period, in part because early animals were soft bodied and could fossilize only under particular condit...
◆Mystery 3:What caused the Cambrian(寒武纪的)explosion? The Cambrian explosion refers to the explosion of complex life that occurred on the Earth about 540 million years ago.Before then,life had consisted mostly of bacteria.But at the beginning of the Cambrian period,complex creatures began deve...
题目:The Cambrian Explosion 内容回忆:本文共9段。第1段讲了生物的进化一般都比较慢,但是有一段时期生物的进化突然变的很快;第2段讲到科学家通过动物的basic body plan 来把动物分成不同的phyla,这个分类现在还在进行中,目前总共有30个不同的phyla。第3段讲到了寒武纪大爆发的来源,由于所有这30个不同的phyla同时...
the way backtotheso-calledCambrian explosion,aninterval when life diversified very quickly [...] chinese.eurekalert.org chinese.eurekalert.org 公认的最古老的内肛动物化石在时间上尚不及石莲桦属分枝花柱的1/3,所以新发现的化石可以将内肛动物家族 的存在时间追溯到寒武纪大爆发时期,那是一个生物多样性突...
But what caused it to be suddenly steady? · Mystery 3:What caused the Cambrian(寒武纪)Explosion? The Cambrian Explosion refers to the explosion of complex life forms that occurred on Earth about 540 million years ago. Before then, life had consisted mostly of microbes. But at the beginning...