調查局三等
114年
[調查工作組] 外國文(英文)
第 39 題
📖 題組：
請依下文回答第 36 題至第 40 題： Throughout the history of life, there have been many major upheavals in which whole groups of animals were replaced by others. Perhaps the most famous was the replacement of dinosaurs by mammals about 65 million years ago. Another major change occurred roughly 150 million years earlier, when dinosaurs assumed dominance that had been held for about 80 million years by mammal-like reptiles. What triggered these great upheavals? Scientific thinking about the factors responsible for these replacements has itself changed with significant shifts. At times, scientists suggested that mammals caused dinosaur extinction by eating eggs or competing for the same food resources. However, most researchers now agree that mammals played at most a minor role—since both groups coexisted for millions of years—and that environmental change was primarily responsible. Mammals apparently remained small and inconspicuous in the Mesozoic undergrowth for some 150 million years, until the extinction of dinosaurs gave them the opportunity to radiate into available niches.
請依下文回答第 36 題至第 40 題： Throughout the history of life, there have been many major upheavals in which whole groups of animals were replaced by others. Perhaps the most famous was the replacement of dinosaurs by mammals about 65 million years ago. Another major change occurred roughly 150 million years earlier, when dinosaurs assumed dominance that had been held for about 80 million years by mammal-like reptiles. What triggered these great upheavals? Scientific thinking about the factors responsible for these replacements has itself changed with significant shifts. At times, scientists suggested that mammals caused dinosaur extinction by eating eggs or competing for the same food resources. However, most researchers now agree that mammals played at most a minor role—since both groups coexisted for millions of years—and that environmental change was primarily responsible. Mammals apparently remained small and inconspicuous in the Mesozoic undergrowth for some 150 million years, until the extinction of dinosaurs gave them the opportunity to radiate into available niches.
According to the passage, what does the idea that mammals had an opportunity to radiate into available niches imply?
- A Mammals struggled for millions of years in the available Mesozoic undergrowth.
- B Mammals could spread out into new territory due to the extinction of dinosaurs.
- C Mammals had the ability to emit light into the niches.
- D Mammals had to find other niches because of the radiation of the sun.
思路引導 VIP
請思考一下：當原本佔據大片土地、資源最強大的群體突然消失後，那些長期躲在暗處、體型矮小的倖存者，在競爭壓力消失的情況下，行為上會產生什麼樣的轉變？他們會如何利用這些「空出來的位置」呢？
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