Fossil formations like the Burgess Shale show that evolution cannot always be thought of as a slow progression.(Q2.b.顯示總是慢?) 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. (a.)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 sequence in the Cambrian explosion? Perhaps another ancient fossil bed of soft-bodied animals from 600-million-year-old seas is awaiting discovery.
11.What can be inferred from paragraph 7 about why the Cambrian explosion is so unusual?
A)It generated new ecological niches through the extinction of many unique animals.(Q1.錯是因為與題意相反嗎?)
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.
A)Zoologists are awaiting the discovery of a 600-million-year-old fossil formation in order to be able to form a theory of how animal evolution progressed.(討論)
這式綜結題的答案我覺得怪怪的因為他在最後一句
你們覺得呢??
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发表于 2010-11-11 20:41:41
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