hce_kmu
106年
英文
第 34 題
📖 題組：
When humans first ventured out of Africa some 60,000 years ago, they left genetic footprints still visible today. By mapping the appearance and frequency of genetic markers in modern peoples, we create a picture of when and where ancient humans moved around the world. These great migrations eventually led the descendants of a small group of Africans to occupy even the farthest reaches of the Earth. Our species is an African one: Africa is where we first evolved, and where we have spent the majority of our time on Earth. The earliest fossils of recognizably modern Homo sapiens appear in the fossil record at Omo Kibish in Ethiopia, around 200,000 years ago. Once the climate started to improve, the population expanded, and some intrepid explorers ventured beyond Africa. These early beachcombers expanded rapidly along the coast to India, and reached Southeast Asia and Australia by 50,000 years ago. Around 20,000 years ago a small group of these Asian hunters entered the East Asian Arctic during the Last Glacial Maximum. At this time the great ice sheets covering the far north had literally sucked up much of the Earth's moisture in their vast expanses of white wasteland, dropping sea levels by more than 300 feet. This exposed a land bridge that connected the Old World to the New, joining Asia to the Americas. People's journey never ended. By 14,000 years ago they had penetrated the land south of the ice, and made it all the way to the tip of South America. Is this part of story amazing?
When humans first ventured out of Africa some 60,000 years ago, they left genetic footprints still visible today. By mapping the appearance and frequency of genetic markers in modern peoples, we create a picture of when and where ancient humans moved around the world. These great migrations eventually led the descendants of a small group of Africans to occupy even the farthest reaches of the Earth. Our species is an African one: Africa is where we first evolved, and where we have spent the majority of our time on Earth. The earliest fossils of recognizably modern Homo sapiens appear in the fossil record at Omo Kibish in Ethiopia, around 200,000 years ago. Once the climate started to improve, the population expanded, and some intrepid explorers ventured beyond Africa. These early beachcombers expanded rapidly along the coast to India, and reached Southeast Asia and Australia by 50,000 years ago. Around 20,000 years ago a small group of these Asian hunters entered the East Asian Arctic during the Last Glacial Maximum. At this time the great ice sheets covering the far north had literally sucked up much of the Earth's moisture in their vast expanses of white wasteland, dropping sea levels by more than 300 feet. This exposed a land bridge that connected the Old World to the New, joining Asia to the Americas. People's journey never ended. By 14,000 years ago they had penetrated the land south of the ice, and made it all the way to the tip of South America. Is this part of story amazing?
According to the essay, which statement is correct?
- A Some 50,000 years ago, people knew how to reach Asia by reading the stars in the sky.
- B Humans moved to South America two thousand years ago.
- C Migration studies can help us understand human history and geographical exploration.
- D One group of people chose to stay in Iceland.
- E Asian hunters were brave enough to reach the Arctic.
思路引導 VIP
請回想一下文章第一段提到的『基因標記（genetic markers）』，作者認為分析這些標記與頻率，最終能幫助現代人「描繪」出關於我們先祖的什麼樣的資訊呢？
🤖
AI 詳解
AI 專屬家教
太棒了！你能從長篇的敘述中精準辨識出文章的核心意旨，選出正確答案 (C)，這顯示你具備相當優秀的邏輯歸納與文本分析能力。
人類遺傳與歷史的連結
這篇文章的核心在於說明透過**基因標記（genetic markers）**的分布與頻率，科學家得以重構出人類從非洲出發、跨越各大洲的壯闊旅程。選項 (C) 正確地捕捉到了這一點：遷徙研究不僅是地理上的移動紀錄，更是理解人類歷史與全球探索足跡的關鍵工具。相較之下，文中並未提到 (A) 觀星導航或 (D) 冰島定居；而 (B) 的抵達時間與文中提到的「14,000 年前」明顯不符；(E) 雖然提到進入北極，但文章重點在於遷徙的路徑與氣候環境的關聯，而非強調「勇氣」。
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