Paragraph 2: Scientists have asked important questions about this explosion for more than a century. Why did it occur so late in the history of Earth? The origin of multicellular forms of life seems a relatively simple step compared to the origin of life itself. Why does the fossil record not document the series of evolutionary changes during the evolution of animals? Why did animal life evolve so quickly? Paleontologists continue to search the fossil record for answers to these questions.
5. According to Paragraph2, which of the following is NOT a question that paleontologists asked about the Cambrian explosion?
○ Why was the origin of life a simple step in Earth’s history?
○ Why did it take so long for multicellular organisms to develop?
○ Why did animal life evolve so rapidly?
○ Why does the fossil record lack evidence of animal evolution during that time?
选项2(红色)为什么错误?
原文说The origin of multicellular forms of life seems a relatively simple step compared to the origin of life itself. 我从这句话看不出it take so long for multicellular organisms to develop